There is no one definitive answer to this question. It depends on the purpose of the post and who the author wants to reach with the message. For example, if the author is sharing a personal story about their mental health journey, they may want to add people who are struggling with mental health issues to the audience. Or, if the author is sharing a funny story about their childhood, they may want to add people who are close to them and who will appreciate the humour. Ultimately, it is up to the author to decide who they want to add to the audience of the post.