There's a button underneath almost every post on your Facebook business page. Blue, hard to miss, and it says "Boost Post." Facebook put it there on purpose. It's the easiest way to spend money on the platform, and it's one of the most reliable ways to get less back than you paid for.
That's not a universal rule, and it's worth understanding exactly why, because the Boost button isn't broken. It's just built to do something different from what most businesses actually need from it.
What the Boost button actually does
When you click Boost, Facebook takes that post and puts it in front of more people. Simple enough. What it doesn't tell you is what objective it's optimizing for. By default, it optimizes for engagement, meaning it finds the people most likely to like, comment, or share. That's the metric it's designed to move.
The problem for a local service business is that engagement and revenue are not the same thing. Facebook's algorithm is very good at finding people who click Like. It is not, by default, trying to find people who need a plumber, are about to hire a landscaper, or are shopping for a dentist right now. Those are different people, and the Boost button doesn't let you tell it which one you're looking for.
One auditor reviewing ad accounts found that in businesses spending entirely through the Boost button, the pattern was consistent: plenty of likes, zero sales. The average cost per lead on Facebook jumped to over $27 in 2025. Spending that budget through the Boost button, with no objective control and no custom audiences, tends to push that number higher, not lower.
What Ads Manager does differently
Meta Ads Manager uses the same budget and the same platform. The difference is that it asks you what you actually want before it spends anything. Do you want leads? Booked appointments? Website conversions? Once you tell it the objective, it trains its algorithm to find people who are statistically more likely to do that specific thing, not just people likely to tap a heart.
Ads Manager also lets you build real audience targeting, reaching people in a specific zip code who own homes, have searched for home services, or match the profile of your best existing customers. The Boost button offers a simplified version of this. It's enough to get started, but not enough to optimize.
When boosting is actually fine
Here's where most articles on this topic overcorrect. The Boost button is a real tool with real uses. If you have a post that's already performing well organically, a few comments and shares within the first couple hours, boosting it to expand that reach is a reasonable decision. It's essentially paying to amplify something that's already working, and the algorithm has some evidence about who's responding before you spend a dollar.
A $10 or $20 boost on a post like that, aimed at building awareness rather than direct conversion, is not a waste. A $200 monthly budget distributed across every post you make, with no strategy behind which ones get boosted or why, is a slow drain with nothing to show for it.
The honest version of this
The Boost button exists because it generates revenue for Facebook. It lowers the barrier to spending to the point where the decision barely feels like a decision. That's by design. For businesses that are just getting started with Facebook advertising, it's a reasonable first step. For businesses that have been boosting posts for months and can't point to a single customer it produced, it's worth asking whether the money would do more inside Ads Manager with a real objective set and a real audience defined.
The same dollar spent with more intention tends to go further. That's true on Facebook and everywhere else.