With Salesforce Chatter, you can have a running feed of action items on your record pages. This functionality allows you to:
Post updates that the entire team can view and comment on
Tag other teammates with action items or updates, which will appear in their notifications in Salesforce
You can also install a Chatter feed on your home page, where you can view all bookmarked Chatter posts.
See this video for how you can get the most out of Salesforce Chatter