You should use a comma between two adjectives when they are coordinate adjectives. Coordinate adjectives are two or more adjectives that describe the same noun equally. ... Because coordinate adjectives are equally important, they are separated by a comma.

Do you put a comma between three adjectives?

Don't use a comma between cumulative adjectives. Coordinate adjectives modify a noun equally and separately. When coordinate, each adjective modifies the same noun separately and equally.

Which rule's must you follow to use a comma to separate adjective?

Rule #7: Use Commas to Separate Coordinate Adjectives

When you're describing something with two or more adjectives, you can use a comma between them if those adjectives are coordinating. (They're coordinating if you could place “and” between them.) You shouldn't put a comma after the final adjective.