First, the meaning is different.
1.well means: healthy; Good; appropriate
2. Good means: OK; Superior; excellent
Second, the usage is different.
Usage of 1.well: it basically means "health", indicating health status, and can be used as an attribute or predicative in a sentence.
Example:
Is she healthy enough to travel?
Is she healthy enough to travel?
Make good use of: when used as a predicative in a sentence, it means to make good use of (something), be good at handling (something) and be kind to (someone), followed by for, to, to and at. When good is used as a predicative, it can be followed by a verb infinitive.
Example:
A good video camera will cost you a lot of money.
A good video camera will cost you a lot of money.
Third, the emphasis is different.
1. well, the point: refers to the abstract.
2. Good focus: refers to objective existence.