Whether they're in my contacts or not every once in awhile after I receive a text in the bottom rights corner of the bubble there's a little blue dot that I can't get rid of half the time what is it for
Rcs stands for rich communication service. It is the android equivalent of Imessage. You can see read receipts, typing indicators, and reactions if the other user is on an android and has the feature enabled. Apple devices however cannot use this feature because Apple being Apple, won't adopt this feature.
