Conjunction it used to connect 1 sentence with another sentence
1. Coordinating Conjunction are used to join two words or phrases that are equally important and complete in terms of grammar when compared with each other. (are For,And,Nor,But,Or,Yet,So.)
2. Subordinating Conjunction are used to join an independent and complete clause with a dependent clause that relies on the main clause for meaning and relevance. (Although, as,before, once, though,until,whether.)
3. Corelative Conjunction, they are pairs of conjunctions used in a sentence to join defferent words or groups of words in a sentence together (both/and,either/or,just/as,so,neither/nor, etc.)