"Beside" is a preposition that means "close to" or "next to." "Besides" is also a preposition that means "in addition to" or "apart from." It's can also serve as an adverb that means "furthermore" or "another thing."

How do you use besides?

Besides can be used either as a preposition meaning “in addition” or an adverb meaning “moreover,” and it is a little less stiff and formal to use than those two terms. I dislike fishing; besides , I don't even own a boat.

What is the difference between besides And besides that?

"Besides" means "addition to" and you can use it in a sentence like : "Television can educate us besides entertaining us." You can also use it to connect two sentences. e.g. "Walking in the park is really fun. Besides, it's good for our health." Here, it also means "also". Besides that” means “in addition to that”.