The word "best" is a comparative (superlative) adjective, not an adverb.
It is time adverb
It is an adverb of degree.
Adverb of Degree
adverb of degree
There is no adverb derived from type. Not every word has a corresponding noun verb adverb adjective etc
It's an adverb of time.
Avoid is not any type of adverb because it's a verb.
No, it is an adverb of indefinite time. This is another type of adverb of time.
Is is not an adverb it is a be verb. Be verbs are: present -- am is are past -- was were
Do it to the best of your ability.
when
adverb of frequency, like - sometimes always often