Salesforce Chatter online collaboration tools provides features like topics pages. With Chatter online communication tools like topics pages you can collect and present the most up-to-date content on any subject discussed on the Chatter network.
Topics pages collect and present the most up-to-date content on any subject discussed on your Chatter network. Topics gather relevant posts and answers, suggest groups, experts, files, and other resources that relate directly to any topic. Topics pages are automatically generated and can be followed by any Chatter user.