A conjunction is the joining together of elements and it is a word that connects sentences, phrases or clauses.

Coordinating conjunctions are easy to remember with an acronymic mnemonic device:

FANBOYS

For, And, Nor, But, Or, Yet, So

Here are some examples of coordinating conjunctions in English and what they do:

        For – presents rationale – I went to the store to get soda, for I was thirsty.

        And – presents non-contrasting item(s) or idea(s) – I love to fish, and I like to hunt.

        Nor – presents a non-contrasting negative idea – He does not fish, nor does he hunt.

        But – presents a contrast or exception – They fish, but they don’t hunt.

        Or – presents an alternative item or idea – Every day they fish, or they hunt.

        Yet – presents a contrast or exception – They fish, yet they don’t hunt.

        So – presents a consequence – He fished well yesterday, so he hunted to celebrate.

https://en.wikipedia.org/wiki/Conjunction_(grammar)