Do I need a comma before and when put three nouns together?

You generally don't need a comma before "and" when listing three nouns together.

Example:

* I bought apples, oranges, and bananas.

Here's why:

* Conjunctions: "And" is a conjunction used to join words or phrases.

* Short Lists: When listing three or fewer items, commas are usually only needed between the first two items.

Exception:

If the items are long or contain internal commas, you can use a comma before "and" for clarity:

* Example: I bought a dozen red apples, a bag of juicy oranges, and a bunch of yellow bananas.

In summary, you generally don't need a comma before "and" when listing three nouns together, but you can use one if it improves clarity.