John Gill Commentary Exodus 18:24

"So Moses hearkened to the voice of his father-in-law, and did all that he had said." — Exodus 18:24 (ASV)

So Moses listened to the voice of his father in law
Considered what he said, weighed it well in his mind, and judged it good advice, and determined to follow it:

and did all that he had said ;
by choosing such men as he directed to, and committing the judgment of the people to them, as follows: