Adverbs are expressions that function as modifiers of other elements in the clause. They can provide a wide range of information.

Adverbs of degree are used to provide information about the intensity of an action or adjective {see Adverbs of Degree, A1 Level}.

Intensifiers and mitigators are part of adverbs of degree.

https://open.books4languages.com/english-a2-grammar/chapter/intensifiers-and-mitigators/