If you need to mark any of your Photo Albums temporarily or have them stand out from the rest of your albums, you can use “gold stars.” These gold stars are small yellow star icons in your "Tags" section that you can use to mark your Photo Albums as “important.” Every album that you create will have a small star icon to the left of the album name.
Using Gold Stars
All Photo Albums have the option of being marked as “Important” by using a gold star icon. You can mark Photo Albums with a gold star either when the Photo Albums is in editing mode, or when the Photo Album is being viewed in your Folder.
You can also view all of the Photo Albums that have been marked with a gold star when you click "Tags" icon at the top of your folder, click on the "Important" tab, and then the "tags" icon will turn into the star icon. only photo albums marked with the star will show. See the image below: