Search gives your users ten links. An agent trained on the same pages gives them the answer, with a link to the page it came from — and tells you which questions your documentation cannot answer at all.
Train one on your site, freeThe agent answers from your pages and cites them. When something is wrong you can see which page taught it that, which turns an argument about the bot into a five-minute content fix.
And when retrieval is too weak to be sure, it says so instead of filling the gap with something that sounds right.