Who are you posting for? Who else will be seeing it? Who might find it in the future?
The levels of AUDIENCE radiate out from you, the poster. When we talk about AUDIENCE we focus on three levels:
(1) the person (imagined or real) you’re directly addressing,
(2) other people (imagined or real) you know will see your post,
(3) any people (imagined or real) who may find your post in the future.