The conjunction is a jointing word that joins words, phrases, clauses, or sentences together.
For examples: and, yet, but, for, nor, or, so, because, that, which, who, when, until, etc.
I have a dog and a cat. She will drive or fly. It is early, but we can go. He is having a good health because he regularly exercises. She tries very hard in school yet she is not receiving good grades.