The version of Android after 4.0.x (Ice Cream Sandwich) in the Android version sequence. Please only use this tag if your question specifically pertains to Jelly Bean and its features.
This Android version (4.1) was announced at Google's IO conference on July 27th, 2012. It included major updates such as:
Google Butter
- feature improvements with respect to the display
- screen refresh moved to 60htz
- GPU and CPU cycles optimized
Google Now
- monitors actions such as searches and travel to give personalized information, organized into cards
Notification Updates
- one can now enable/disable notifications per application
- options, such as snoozing appointments and returning calls, can be chosen from notifications themselves
- support for additional information (news headlines, etc.) display within notifications
