One font URL per line. You can also add a collection URL to include all the fonts from that collection.
Leave this setting as "Most-Used First" to automatically sort your fonts based on how often they're used.
If this is a new collection name, choose a new password. If you're editing an existing collection that you created, then you must enter the password that was used when you created the collection. Please don't reuse an important password from a different website.