Object pronouns are pronouns that come after either verbs or prepositions.
Read these phrases:
What words come before each pronoun in the above phrases? What do you call these words?
The words loved, admire, remember, and forget are verbs. The words to and with are prepositions.
Pronouns that come after a verb or a preposition are called object pronouns. Thus the words them, us, me, her, and him are object pronouns. They come either after verbs or prepositions.