What are Favorites (Library Catalog)?
Answer
When browsing the Library Catalog (Discover), each result in your search has an "add this item" 
icon next to it that gives you the option to save the record to your Favorites.
Favorites are like your bookmarks in a web browser - a means of marking items of interest for later use - not a means of reserving an item or placing it on the Hold Shelf.
To use this feature, you must first sign in with your NetID and password by clicking the Sign In button in the top-right corner of the window in your Discover search.
Then, click the Favorites icon next to the desired item in your search results. This item is now saved for quick access any time; just click the 
at the top of the Discover page to view your items.