Different angle from most answers here the cheapest, highest quality clicks I've found are brand keyword bids on Google Search for SaaS tools that don't defend their own brand terms. when a company isn't bidding on their own name, you become the only bidder. Google has no one to compete against, so the auction price drops to near nothing. I've run campaigns at $0.04 average CPC for months on terms that still convert because the people clicking already know the product and are ready to buy. The intent is pre-built, you're just capturing it. The quality issue basically solves itself with search. No bots, no accidental clicks, no pre-landers needed someone typing a specific brand name into Google at 2am isn't a bot. The challenge is finding programs where the company hasn't woken up to the fact that they're leaving this traffic on the table. compare that to native or pop where you're fighting bots with blacklists and pre-landers that's a legitimate approach but you're spending a lot of energy just getting the traffic to behave. search gives you buyer-intent traffic by default, the cost only goes up when competitors show up.