We can think of a "Saving" as a favourite or a shortcut. Saving means to mark an app for later retrieval or for an easier access. To save an app, users have to click on the homepage and search for a public app with the app name on the web or on the mobile if users know the names of the public apps already.
Afterwards, you can save the app or bookmark it by clicking on the icon as shown below;
Liking an App
After searching for an app from the search box on the homepage, you can like the app by clicking on the "heart" icon as shown below: