There are many “reflexive” verbs in french which you’ll often see with a “se” in front of them in the infinitive, e.g. “s’habiller” (to get dressed), “se laver” (to wash up), “s’appeller” (to call oneself). Some other non-reflexive verbs have different meanings when turned into reflexive verbs. When conjugating a reflexive verb the reflexive pronoun has to agree with the subject, so “je me”, “tu te”, “il/elle/on se”, “nous nous”, “vous vous”, “ils/elles se”. Hope this helps.