Basically, use good to describe a thing and use well to describe an activity.
Good is an adjective
Use good to describe a noun.
You smell good. I like your perfume.
(good describes the noun you)
This is a good song.
What a good boy.
You speak good English.
Well is an adverb
Use well to describe a verb, adjective or another adverb.
She did well on the test.
(well describes the verb did)
The song is well written.
He's a well behaved boy.
You speak English well.
Use well for health
I heard you were ill, how are you now?
I'm well thanks.
Use good for an emotion
You have a test tomorrow, how do you feel?
I'm feel good.
Now decide if these sentences need good or well:
