Bookmarks
You can now Bookmark your favorite Questions, Dashboards, and Collections to access them later from the sidebar. Bookmarked items also get a boost in your search results.
You can Bookmark a Collection by selecting the Ribbon icon near the top-right of your menu.
A Question can be Bookmarked by exposing the Editor Menu drop down at the title of the Question, then selecting the Ribbon icon.
To Bookmark a Dashboard, expose the extended menu by selecting the triple-dot icon, and then Bookmark.
Bookmarked items will appear at the top of your sidebar (exposed by selecting the hidden hover-over icon), above your Collections.
Bookmarks are personal. Other users cannot see your Bookmarks. If you want to highlight something for everyone, you’ll want to put it in an official Collection and/or pin the item in the Collection.