Is it website or web site?
The compound noun website is typically written as one word. You can write it as web site (two words), but this is much less common, so it is best to write it as one word in formal writing such as academic writing.
On a related note, it matters if you spell it site or sight, because these two words are homophones with different meanings.
Use QuillBot’s free Grammar Checker to help you avoid mixing up homophones such as “cite,” “site,” and “sight.”