For your discussion question response for Unit 3(https://artint.info/2e/html/ArtInt2e.html), describe the operation of the A* search.

For your discussion question response for Unit 3(https://artint.info/2e/html/ArtInt2e.Ch3.html), describe the operation of the A* search. Your discussion must describe how A* employs heuristic search by combining lowest-cost-first and best-first searches. Your discussion must also describe the operation and characteristics of each of these searches.

I would like a better explanation of "the operation of the A* search' there are referring to.