Overview
Indirect objects are the lucky noun phrases that receive the direct objects in a sentence. Just like direct object pronouns replace direct objects, indirect object pronouns are the replacements for indirect objects, which are always personal nouns.
Indirect object pronouns in English are:
me, you, him, her, us and them
Singular
me (to/for me)
te (to/for you informal)
le (to/for you informal)
Plural
nos (to/for us)
os (to/for you informal)
les (to/for them, you formal)