Why is evolution through artificial selection more rapid than through natural selection?

Answer 1

I got this from Google when I typed in your question. Why don't you do that and peruse what comes up.
"Because artificial selection applies a known strength and direction of selection to specific phenotypic traits, it is one of the most powerful methods available for understanding the underlying genetic variation and thus evolvability of those traits; in controlled natural selection the strength and direction of ...

Artificial Selection - an overview | ScienceDirect Topics"