in Profile
The Favorites feature lets you save links to posts you want to keep an eye on. Maybe you plan to download it later or just want to track its ratings and comments.
You can add a post to your Favorites by opening the post and clicking the diskette icon (formerly the "Star" icon) next to the title.
Your saved posts can be found in the navigation bar under Favorites.
To remove a post from Favorites:
The number shows how many users added this post to their Favorites.