Chatter Overall: Topics and Einstein Recommendations
Organize your feeds and discover relevant people to follow and groups to
Use Topics to Organize Your Content in Chatter
You most definitely asked, and we most definitely answered by introducing topics in Lightning Experience. No need to set up anything, as our Lightning Experience org is automatically updated to support topics. View a topic detail page, edit the topic description, see how many people are discussing the topic, see trending and related topics, follow topics that interest you...in short, enjoy organizing the heck out of your Chatter feed. Topics even show up in global search results. So go on...tag away! This feature is new in Lightning Experience.
Discover People to Follow and Groups to Join
Personalized Einstein Recommendations on the Chatter home page help you find the people and groups that most closely relate to your job and interests. The more recommendations you accept, the more relevant your feed becomes. This feature is new in Lightning Experience.