This document provides guidance on best practices for tagging traffic sources in Google Analytics 4 (GA4). It discusses dimensions in GA4 like campaign, source, and medium. It explains how GA4 classifies traffic into default channel groups and how tags can be manually added. The key recommendations are to select the correct dimension scope, treat default groups as trends, always include utm_campaign, source and medium when tagging, use proper casing, be consistent across sources, leverage GA4 rules, and accurately classify traffic. Proper tagging allows for more accurate analysis of traffic sources in GA4.
3. GA4 TRAFFIC DIMENSIONS
Traffic-source dimensions provide details on:
• specific marketing efforts you use to drive that traffic
(e.g., Campaign, publication, launch, project)
• provide information about where your traffic
originates (Source, e.g., google, nytimes.com,
twitter, facebook)
• methods by which users arrive at your site/app
(Medium, e.g., organic, referral, cpc, email)
support.google.com/analytics/answer/9143382
4. SCOPES OF TRAFFIC SOURCE DIMENSIONS
GA4 organizes traffic source dimensions in the
following hierarchy:
• User - a person who interacts with your website or
app.
• Session - the period from when a user visits to
when they leave.
• Event - a distinct user interaction within a
session.
support.google.com/analytics/answer/9143382
5. GA4 DIMENSIONS
User scoped
(New User Acquisition)
Session scoped
(New & Returning Users)
Event scoped
(Interactions)
First user default
channel group
Session default channel
group
Default Channel
Group
First user campaign Session campaign Campaign
First user campaign ID Session campaign ID Campaign ID
First user source Session source Source
First user source /
medium
Session source / medium Source / medium
First user medium Session medium Medium
6. BEST PRACTICE # 1
When viewing GA4
data, select the
correct traffic
dimension scope.
7. GA4 TRAFFIC TRACKING
support.google.com/analytics/answer/11242841
Name Description Auto Tagging GA4 Dimensions
Channel
Group
Based on Source
and/or Medium
Assigned based on
GA4 rules
First user channel group
Session channel group
Channel Group
Campaign The name of a
promotion or marketing
campaign.
Google Ads
connected service
First user campaign
Session campaign
Campaign
Source Publisher or platform
from which traffic
originated.
System-defined traffic
source
First user source
Session source
Campaign
Medium Method for acquiring
users or sessions to
your website or
application.
System-defined traffic
medium
First user medium
Session medium
Medium
8. CHANNEL GROUPS
• GA4 Default Channel Groups
• Custom Channel Groups
– 2 Groups
– 25 Channels within each Group
support.google.com/analytics/answer/6010097
9. GA4 DEFAULT CHANNEL GROUPS
Organic Search
Direct
Referral
Organic Social
Email
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
10. CHANNEL GROUPS ARE APPROXIMATE
• User Acquisition >
First User Default
Channel Group
• Sessions
Session Default
Channel Group
• Events
Default Channel Group
11. EXAMPLES OF SYSTEM-DEFINED TRAFFIC
SOURCE
• google
• bing
• yahoo
• twitter
• facebook.com
• linkedin
• instagram
MEDIUM
• email
• affiliate
• referral
• cpc|ppc|paidsearch
• social
• audio
• video
12. GA4 CHANNEL GROUPS
Organic Search
Direct
Referral
Organic Social
Email
Source matches GA4
system-defined search sites
OR
Medium
• organic
support.google.com/analytics/answer/9756891
13. GA4 CHANNEL GROUPS
Organic Search
Direct
Referral
Organic Social
Email
• Saved link
(without UTM codes)
OR
• Entering URL
support.google.com/analytics/answer/9756891
14. GA4 CHANNEL GROUPS
Organic Search
Direct
Referral
Organic Social
Email
Medium / utm_medium
• referral
• app
• link
support.google.com/analytics/answer/9756891
15. GA4 CHANNEL GROUPS
Search
Direct
Referral
Organic Social
Email
Source / utm_source
matches system-defined
social sites
OR
Medium / utm_medium
• social
• social-network
• social-media
• sm
• social network
• social media
support.google.com/analytics/answer/9756891
16. GA4 CHANNEL GROUPS
Organic Search
Direct
Referral
Organic Social
Email
Source / utm_source
• email|e-mail|e_mail|e
mail
OR
Medium / utm_medium
• email|e-mail|e_mail|e
mail
support.google.com/analytics/answer/9756891
17. GA4 DEFAULT CHANNEL GROUPS
Source matches GA4
system-defined search sites
AND
Medium
• ^(.*cp.*|ppc|retargeting|
paid.*)$
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
18. GA4 DEFAULT CHANNEL GROUPS
Medium / utm_medium
• audio
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
19. GA4 DEFAULT CHANNEL GROUPS
Source matches a list of
video sites
OR
Medium
• ^(.*video.*)$
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
20. GA4 DEFAULT CHANNEL GROUPS
Source matches Google’s
system-defined social sites
AND
Medium
• ^(.*cp.*|ppc|retargeting|
paid.*)$
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
21. GA4 DEFAULT CHANNEL GROUPS
Medium / utm_medium
• affiliate
Paid Search
Organic Audio
Organic Video
Paid Social
Affiliates
support.google.com/analytics/answer/9756891
22. BEST PRACTICE # 2
Treat Default
Channel Groups as
trends, not
absolutes.
support.google.com/analytics/answer/6010097
25. TAGGING TRAFFIC DIMENSIONS
AUTO TAGGING MANUAL TAGGING
Broad. Specific.
Automatically tags traffic source by Source
and Medium dimensions but DOES NOT
include the Campaign dimension unless
GA4 integrated with Google Ads.
Designates traffic associated with a specific
marketing Campaign across channels as
well as Source and Medium (email, social,
referral, etc.)
GA4 integration with Google Ads provides
you with more dimensions than you get with
manual tagging.
Can introduce errors (utm_source=Google
is different from utm_source=google)
Dependent on a Google system-defined list
of source traffic to categorize into Channel
Groups.
If not done properly, may assign to
incorrect or Unassigned Channel Group.
26. MANUAL TAGGING
UTMs (Urchin Tracking Modules)
• utm_campaign – WRI-designated (flexible), but be consistent
• utm_source – leverage system-defined names
• utm_medium – leverage system-defined names except for
identifying social profiles
• utm_content (Optional) - Used for A/B testing and content-
targeted ads. Use utm_content to differentiate ads or links
from the same Source that point to the same URL.
• utm_term (Optional) – keywords
27. BEST PRACTICE # 3
When manually tagging UTMs, always
include:
wri.org?utm_campaign=campaign-
name&utm_source=source&utm_medium=me
dium
28. BEST PRACTICE # 4
Do
• lowercase
• kebab-case
Don’t
• spaces between words
• camelCase
• snake_case
• PascalCase
• MACRO_CASE
• Train-Case
29. BEST PRACTICE # 5
Be consistent with
Campaign names
across Paid (Google
Ads) and Organic
(manual tagging)
traffic sources.
support.google.com/analytics/answer/6010097
30. BEST PRACTICE # 6
Leverage GA4
Default Channel
rules for Source
and Medium where
possible.
support.google.com/analytics/answer/6010097
31. BEST PRACTICE # 7
Be accurate in your
choice of Source
and Medium for
each Channel.
support.google.com/analytics/answer/6010097
32. TRAFFIC SOURCE EXAMPLE 1/2
Search for session source = “wridigest”
?utm_campaign=wridigest&utm_source=wridigest-2023-01-11&utm_medium=email
35. BEST PRACTICES
1. When viewing GA4 data, select the correct traffic dimension SCOPE.
2. Treat Default Channel Groups as trends, not absolutes.
3. When manually tagging, always include utm_campaign,
utm_source, and utm_medium.
4. When manually tagging, always use lowercase or kebab-case.
5. Be consistent with Campaign names across Paid (Google Ads) and
Organic (manual tagging) traffic sources.
6. Leverage GA4 Default Channel rules for Source and Medium where
possible.
7. Be accurate in your choice of Source and Medium for each Channel.
support.google.com/analytics/answer/6010097
36. 4 WAYS TO MANUALLY TAG
• By hand. Add the following to a URL
?utm_campaign=campaign-
name&utm_source=source&utm_medium=medium
• Google Campaign URL Builder
• Emplifi Publisher
• WRI UTM Creation Tool Spreadsheet
support.google.com/analytics/answer/9756891
37. TAGGING COMPLEX URLS
You can only have one query string/parameters in a URL.
A ? separates the URL from the query string/parameters.
• https://www.wri.org/applications/aqueduct/water-risk-
atlas/#/?advanced=false&basemap=hydro&indicator=w_awr_def_tot
_cat&lat=-14.445396942837744&lng=-
142.85354599620152&mapMode=view&month=1&opacity=0.5&pon
deration=DEF&predefined=false&projection=absolute&scenario=opti
mistic&scope=baseline&timeScale=annual&year=baseline&zoom=2
• wri.org?utm_campaign=campaign&utm_source=source&utm_mediu
m=medium
support.google.com/analytics/answer/9756891
38. TAGGING COMPLEX URLS
Add the UTMs to the existing query string/parameters.
Replace the ? of the Campaign UTM query string with an &
• https://www.wri.org/applications/aqueduct/water-risk-
atlas/#/?advanced=false&basemap=hydro&indicator=w_awr_def_tot
_cat&lat=-14.445396942837744&lng=-
142.85354599620152&mapMode=view&month=1&opacity=0.5&pon
deration=DEF&predefined=false&projection=absolute&scenario=opti
mistic&scope=baseline&timeScale=annual&year=baseline&zoom=2
&utm_campaign=campaign&utm_source=source&utm_medium
=medium
support.google.com/analytics/answer/9756891
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.
[GA4] Default channel group
https://support.google.com/analytics/answer/9756891
Analytics' list of sources and categories
Spreadsheet: https://docs.google.com/spreadsheets/d/1u6W7-3bh4-IBrZoFyG3-Itwu5SE3OQSEwsqpAR29yiU/edit#gid=0
Download a spreadsheet of GA4 default-channel-group sources and categories
If you would like us to add your search, social, video, or shopping site to the list or if you would like to make a change to your current listing, contact us at googleanalytics-channelgrouprequests@google.com. Google Analytics reviews these requests at least once per year and often more frequently. Inclusion is based on Google’s assessment of a number of factors including but not limited to whether a significant volume of traffic is sourced from a given search engine, social site, or shopping site.