When to use "Who" vs "Whom"?
Hello!
The commonly repeated advice for remembering whether to use who or whom is this: If you can replace the word with he or she or another subject pronoun, use who. If you can replace it with him or her (or another object pronoun), use whom.
For example, you don’t have to say: Who did you meet yesterday? Instead, say: Whom did you meet yesterday?
I hope this helps!