Bookmarking allows you to note the Picmonics you want to easily review later.  In the upper right-hand corner of the Picmonic player, you'll see a “...” menu icon that you can click on, it looks like this:

Then, you’ll be able to Bookmark the Picmonic from the drop-down menu as seen here: 

If you'd like to load all of the Picmonics you've bookmarked, you can click on your Search menu in the left navigation bar, and expand the "Bookmarked" menu.