Definition on Google algorithms changes and things you need to take care while performing On-Page and Off-Page optimization for your site.

1. Google Panda Update
By Janakraj Oza

2.  The 1st panda update went into effect on 24 February, 2011.
 The main aim of this new algorithm was reducing ranking for “low-quality
websites” while increasing ranking for “quality websites”.
 Panda update mostly affect the website having following issues:-
1. High percentage of duplicate content on website.
2. Low or no quality inbound links to a page or website.
3. High amount of irrelevant advertising on websites.
4. Keyword stuffing on websites
5. Very low content on pages
Solution:
 Provide the Fresh Content to Google and stay away from Black Hat Tactics.

3. Google Penguin Update
By Janakraj Oza

4.  Penguin focuses on spamdexing and link bombing.
 Website with low quality links are affected negatively. So ensure that all
links to your site come from quality & relevant websites.
 You can also consider other ways like social media to bring traffic to your
website.
 This will ensure you that your site still has traffic in case it is affected by
panda update.

5. Google Hummingbird
Update
By Janakraj Oza

6.  “Hummingbird” is the name of the new search platform that Google
is using as of September 2013, the name comes from being “precise
and fast” and is designed to better focus on the meaning behind the
words.
 Hummingbird is paying more attention to each word in a query,
ensuring that the whole query or the whole sentence or
conversation or meaning is taken into account, rather than
particular words.
 The goal is that pages matching the meaning do better, rather than
pages matching just a few words.

7. Google Pigeon Update
By Janakraj Oza

8.  Google Pigeon update provide more useful, relevant and accurate local
search results that are tied more closely to traditional web search
ranking signals.
 The changes will be visible within the Google Maps search results and
Google Web search results.
 Currently this update is released in USA.
 It does impact local search results rankings and some local businesses
may notice an increase or decrease in web site referrals, leads and
business from the change.
 Google has not revealed percentage of queries impacted by this
update but there is significant amount of change in local search
results.