What am I?

Question

Comment if you know what it is as well

Answer

Memories!
Riddles are fun in my opinion.
~Discovery~ I just found out today, March 26, 2020, that they added ^Bookmarks^ to the questions. I remember when they didn't have that UNTIL now. It could be recent.
~Note~ I've been on and off this app, literally uninstalling and reinstalling this Glow app.
Today I downloaded this app again and found out a new feature which is bookmarks. Now we can save them.

What am I?

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