Here's a first for a Marvel movie: Guardians of the Galaxy Vol. 2 has not one, not two, three, or four, but five post-credits scenes. (As well as a fun Easter egg nods to Thor: Ragnarok. Look out for the Jeff Goldblum cameo as the credits roll.)
Some of the sequences are fun bits that don't require much explanation-- like Kraglin (Sean Gunn) inheriting Yondu's whistle-controlled arrow, or Stan Lee insisting that he has more stories to tell the Watchers. Others require a bit more of a breakdown.