Reservation Buying
Also called reach and frequency
By the AdFlint research team · Last reviewed July 2026
Meta's fixed-price route where you book a set reach and frequency ahead of the flight instead of competing in the auction.
You plan the buy in advance, lock predictable reach, frequency, and price, and accept far less flexibility once it is live. Brand campaigns with a fixed on-air window and a frequency plan use it. Availability is limited by objective, market, and minimum size, and it does not optimize toward conversions, so treating it as a performance channel is the usual misunderstanding.
Key takeaways
- Reservation buying (Meta's Reach and Frequency) locks a fixed price for a guaranteed reach and frequency plan booked in advance, trading flexibility for certainty.
- It has no bid strategy and no conversion optimization - Meta cannot simultaneously guarantee delivery volume and chase the most likely converter, so it does not try.
- It is meant for awareness and frequency-controlled brand flights, not performance campaigns; using it as a substitute for a well-run auction-buying campaign usually underperforms on cost-per-result.
- Availability is limited by objective, minimum audience size, minimum budget, and market, so it is not an option in every account or for every campaign.
In practice.
Reservation buying, which Meta labels Reach and Frequency in the ads interface, flips the normal relationship between advertiser and platform. Instead of setting inputs and letting an auction determine outputs, you specify the outputs you want - a target reach, a frequency cap over a defined window, and a flight of specific start and end dates - and Meta quotes you a fixed price to deliver exactly that. Once booked, the plan is locked: you know before a single impression serves what it will cost and roughly how many unique people will see the ad how many times.
The mechanism behind this is that Meta forecasts inventory and demand for your selected audience and date range, then prices the reservation off that forecast rather than a live auction. Because the price is fixed in advance, Meta is effectively taking on the delivery risk - if the audience turns out to be more competitive than forecast, that is Meta's problem, not yours. This is the opposite of auction buying, where price risk sits entirely with the advertiser and floats with real-time demand. Availability is genuinely constrained: reservation buying is only offered for a subset of objectives (largely awareness and reach-style goals), requires a minimum audience size and minimum budget, and is not available in every market or on every placement.
Reservation buying interacts with almost none of the settings that matter for performance campaigns. There is no bid strategy to choose - no Highest Volume, Cost Cap, Bid Cap, or ROAS Goal - because you are not bidding in an auction; you are purchasing a fixed delivery plan. Conversion optimization is not available; Meta cannot promise a fixed reach and frequency while also chasing the person most likely to convert, since those two goals pull delivery in different directions. What you do control is frequency capping with much more precision than auction buying allows, since the entire point of the product is to manage exactly how many times each person sees the ad within the flight.
The mistake advertisers make is reaching for reservation buying when what they actually want is predictable performance, not predictable reach. Reservation buying answers the question "how do I guarantee 2 million unique people see this exactly 3 times over the next two weeks for a brand launch," not the question "how do I get more purchases for the same budget." Using it for a lower-funnel push means giving up the auction's ability to chase the people most likely to buy, in exchange for a delivery guarantee that a bottom-funnel campaign rarely needs. The second mistake is assuming reservation pricing is always cheaper - it is priced for certainty, and during low-competition periods an equivalent auction buy can land at a lower effective CPM than the locked reservation rate.
In reporting, reservation buying campaigns should be read on reach, frequency, and completion-style metrics rather than cost-per-conversion or ROAS, because those performance metrics simply were not the buying mechanism's job. If a reservation campaign is running alongside auction-bought performance campaigns in the same account, resist comparing their CPMs directly - one was priced by a forecast-based guarantee, the other by live competitive bidding, and the numbers are not measuring the same thing even when they look like the same unit.
Comparing a locked reservation quote to an auction estimate
Suppose a brand wants to reach 500,000 unique people in a metro area exactly 3 times over a two-week launch window. Meta's reservation tool quotes a fixed $9,000 for that exact reach and frequency, guaranteed regardless of what happens in the broader auction during those two weeks.
The team also checks what an equivalent auction-buying campaign might cost using recent CPM history for that audience, roughly $14 CPM. Delivering 500,000 people at frequency 3 means about 1.5 million impressions, which at $14 CPM would cost around $21,000 in the auction - but only if delivery goes exactly as forecast, with no guarantee the auction actually reaches all 500,000 unique people at that frequency rather than over- or under-delivering to a smaller or larger pool. Here the reservation price is notably cheaper and removes the delivery-risk uncertainty, which is exactly the tradeoff reservation buying is designed to sell: certainty at a locked price, in exchange for giving up the auction's ability to optimize who specifically gets shown the ad.
Reservation Buying compared with
The settings this gets confused with, and how to tell them apart.
Common questions.
Where do I find reservation buying in Meta Ads Manager?
It appears as "Reach and Frequency" as a buying type when creating a campaign, but it is only offered for eligible objectives and only shows up once your audience meets Meta's minimum size threshold for that market.
Can I optimize a reservation buying campaign for conversions?
No - reservation buying does not support conversion optimization or any bid strategy, because guaranteeing a fixed reach and frequency is incompatible with dynamically chasing whichever impressions are most likely to convert.
Why can't I select reservation buying for my campaign?
It requires a minimum audience size, a minimum budget, and an eligible objective (typically awareness or reach-oriented), and it is not available in every market or placement combination - if any of those thresholds aren't met, the option won't appear.
Is reservation buying always more expensive than the auction?
Not always - it's priced off Meta's inventory forecast for your exact audience and dates, so during high-competition periods it can be cheaper than a volatile auction, while during quiet periods an auction buy might land at a lower effective cost. The value isn't price, it's certainty.
You should not need to know this to advertise.
AdFlint handles the settings for you, inside the Google and Meta accounts you already own.
Try AdFlint free