Simply put, pronouns replace nouns. Pronouns refer to people, places, things, and ideas, without having to use the same nouns over and over. The French language uses five types of personal pronouns. These French pronouns are the equivalents to I/me, you, or he/him/it:

Person Subject Pronoun Direct Object Pronoun Indirect Object Pronoun Reflexive Pronoun
1st person singular je me me me
2nd person singular tu te te te
3rd person singular (masc.) il le lui se
3rd person singular (fem.) ell la lui se
1st person plural nous nous nous nous
2nd person plural vous vous vous vous
3rd person plural ils, elles les leur se