This document discusses Facebook's features for apps, including invitations, notifications, and news feeds. It notes that over 366 million apps were installed in the first 20 weeks and that the selection algorithm for what appears in a user's news feed is not published but depends on individual factors. The document also raises questions about how apps can best design their framework and optimize testing, targeting, and adapting to platform changes.

1. Sieu thi dien may Viet Long - www.vietlongplaza.com.vn
A Two-Minute History
Invitations, Notifications,
& Feeds on Facebook
Graphing Social Patterns
October 9, 2007
Justin Smith
InsideFacebook.com justin@insidefacebook.com
Watercooler, Inc. justin@watercooler-inc.com

2. Since May 25
 366 million apps in first
20 weeks (Adonomics)
 >1 billion in first year?
 14 million unique app
users in August (Compete)
 88 million app visits
 4:30 per visit

3. Invitations
 Initial bonanza
 Now volume limited
 Starting to target
 No built-in stats

4. Invitations

5. Feeds
 News and Mini Feeds
introduced Sept 2006
 Broadcasts your activity
 Privacy concerns

6. Feeds
You can optimize
 Story
 Elements
 Calls to action

7. News Feed
Selection algorithm
 Not published
 Depends on individual
 No built-in stats
> Only friends also with the
app see your feed items

8. Notifications
 Friends of logged-in
user or anyone with app
 Can still email (?)
 Can get shut down
 Not very transparent
 Short view vs. long view

9. Questions/Issues
 Design framework
 How/when/why
 Testing / optimization
 Targeting
 Analytics
 Adapting to Platform changes
 Often announced, sometimes documented
 Spam

10. Viral Strategy Panel
 Blake Commagere, Mogad (Causes, Vampires, Zombies)
 Jia Shen, RockYou
 Jason Ackerman, TeachThePeople
 Tim O’Shaughnessy, HungryMachine