When the target audience is very small, the usual approach of casting a wide net does not work. Marketers tend to focus on exact match keywords, meaning the ad only shows when someone searches for a very specific phrase. They also use audience layers, which are filters that narrow down who sees the ad based on job title, interests, or past behaviour. The budget is usually kept small and spent carefully since every click matters more. Broad targeting with a tiny audience just burns money. So what do you think is the best bidding strategy when the potential audience for a campaign is very limited?