Use “who” when referring to the SUBJECT of a verb and “whom” where reference is to the OBJECT of a verb or preposition.

Incorrect: “Whom likes Miles Alex Writer’s Page?”

Correct: “Who likes Miles Alex Writer’s Page?”

Here “who” is the subject of the verb “likes.”

Incorrect: “Kudos to all my followers who I so appreciate!”

Correct: “Kudos to all my followers whom I so appreciate!”

Here “whom” is the object of the verb “appreciate.”