The Experts Documentation wiki has like buttons on every page, blog post, and comment. If enough people like a page or post, it will show on the dashboard's 'Popular' tab. The information in the 'Recommended Updates' email message is based on the number of people who have liked the content.
Click the Like button to let people know that you agree with or enjoy a page, blog post, or comment. Click Unlike to remove your name from the list of people who like the content.
You can also see:
When you like a page, blog post, or comment: