How to Choose an Advertising Agency for Facebook: A Practical Test

Choose an advertising agency for Facebook by testing platform knowledge, not by comparing portfolios. Ask which campaign objectives they run and why, how they plan around Meta's learning phase, how they report cost per acquisition, and what happens to your schedule when a creative sits in review. Specific answers beat slides.

In short

• Meta's learning phase needs roughly 50 results in a week after the last significant edit, so a week with big changes to audiences, creatives or budget restarts that clock.
• Meta now offers six campaign objectives; the old Conversions and Messages objectives are gone, so anyone still naming them is working from outdated material.
• Google Ads has no fixed minimum budget, while LinkedIn needs at least 10 USD a day and TikTok needs more than 50 USD per campaign per day.
• Ad review is not instant anywhere: Meta says most ads are reviewed within 24 hours, Google within one business day, Microsoft Advertising within 48 hours.
• Judge an agency on how it plans around those windows, not on day-two numbers.

What does an advertising agency for Facebook actually do?

An advertising agency for Facebook plans, buys and manages paid campaigns on Meta, and usually on other platforms too. The work splits into four parts: strategy (which objective, which audience, which offer), production (creative and copy built for the placement), operation (budget pacing, testing, editing), and reporting (what the money bought, measured against your own conversion definition).

The split matters when you compare agencies. Some are strong at production and thin at measurement. Some run media well but hand you a dashboard you cannot reconcile with your CRM. Decide which of the four parts you are actually buying, because the price and the contract look very different depending on the answer.

If you only need the creative half, a facebook ad creative agency can be a better fit than a full-service shop. If you need the whole loop from creative to reported acquisition cost, you need someone who owns all four parts.

Which questions reveal whether an agency really knows the platforms?

Ask about objectives, conversion windows and review times. Anyone can talk about targeting; the answers to these three questions separate people who run accounts daily from people who read about it once.

On Meta, ask which campaign objectives they use and why. The platform now offers six: awareness, traffic, engagement, leads, app promotion and sales. The old Conversions and Messages objectives no longer exist. An agency that still names them is working from material that is years out of date, and that tells you how it will handle the next platform change.

On Google, ask how it handles conversion windows. The click window defaults to 30 days and can be set from 1 to 90. The choice changes which campaigns look profitable, so the answer tells you whether the agency thinks about attribution or just reads the top line.

Then ask what it will leave alone. Good media buyers change one thing at a time and wait. If every answer involves rebuilding the account, you will spend the first month watching the learning phase restart.

How long before you can judge results?

Give an agency at least one full learning cycle plus a stable week before you judge performance. Meta's learning phase ends after roughly 50 results in a week following the last significant edit. Any week with big changes to audiences, creatives or budget restarts that clock, so a chaotic first month is not evidence of failure or success.

This is where most client-agency relationships break. The client wants a verdict on day two. The agency, if it is honest, says the campaign is still learning. The useful conversation is not "what are the numbers" but "what will you change, and what will you leave alone, while the campaign is still learning". An agency with a plan for that window is worth more than one with a good screenshot from a past account.

Ask for the plan in writing before launch: what gets tested first, what counts as a result, how long the test runs, and what decision follows each outcome.

How should you compare agencies side by side?

Score them on the same questions, in the same order, and write the answers down. The table below is the comparison most buyers never run.

Two things to notice. First, every strong answer is about process, not results. Second, a weak answer in one row usually repeats in the others, because it comes from the same gap.

Does the agency need to manage every platform you advertise on?

No. Match the platform to where your buyers are and to what the agency can run well. Adding platforms adds budget floors, separate creative specs and separate reporting, and a small budget split three ways often buys nothing anywhere.

The floors are real and they are not negotiable. LinkedIn requires a daily budget of at least 10 USD, a minimum audience of 300 people and a recommended audience of 50,000, so it rarely fits a small local offer. TikTok sets its own daily floors, above 50 USD per campaign and 20 per ad group. Google Ads has no fixed minimum budget, but a budget too small to gather data will not tell you anything useful. Meta's minimum depends on your country, currency, objective and payment method, and the ads manager warns you when a budget falls below it.

If your agency pushes a platform your budget cannot support, that is a signal about whose interest the plan serves.

What should the reporting actually show?

Reporting should show cost per acquisition, click-through rate, cost per click and cost per thousand impressions, all tied to the same conversion definition you use internally. If your sales team counts a qualified lead and the agency counts a form fill, you will argue about numbers forever. Agree on the definition before the first campaign goes live.

There is a measurement limit worth knowing. GA4 keeps event data for either 2 or 14 months depending on your setting and does not store IP addresses, so long lookback comparisons have limits. Ask how the agency handles that gap instead of accepting a dashboard at face value. Server-side conversion tracking that passes CRM stages back to the platform closes part of it, and it is a fair question to ask whether the agency can set that up or expects you to.

What should you ask about ad review and approval timelines?

Ask what happens to your schedule when a creative sits in review. Meta says most ads are reviewed within 24 hours, sometimes longer. Google says most ads are checked within one business day, and Microsoft Advertising within 48 hours. An agency that promises instant launches is guessing.

The practical question is not the average, it is the plan. If a launch slips by a day, does the agency have approved backup creative ready, or does the whole campaign wait? Agencies that run accounts at volume keep a queue of pre-approved variants for exactly this reason.

How do you check the creative side before signing?

Ask to see the working process, not the highlight reel. A facebook creative agency lives or dies on volume and iteration: how many variants it produces per concept, how it reads performance by placement, how fast it replaces a losing creative. If the answer is a single hero asset per campaign, the account will stall as soon as that asset fatigues.

Production speed matters as much as taste. Templates and a repeatable format let a team ship variants weekly without a new design brief each time. Tools that generate banners from a fixed layout help here, and it is reasonable to ask what the agency uses to keep that pace. The same logic applies to text: pre-checking copy against platform rules before submission avoids a rejection cycle that costs you a day. If you want to see how that part works on the tooling side, the AI ad generator for banners and ads covers the workflow.

What does the fee depend on, and how do you find your own number?

There is no standard rate to quote, because agency pricing is built from scope, not from a price list. What drives the number: how many platforms are in scope, how much creative the agency produces, whether it handles tracking and CRM handoff, how much of the reporting is custom, and how senior the person on your account actually is.

The honest way to find your number is to price the scope, not the label. Write down exactly what you want done each month, get three agencies to quote that same list, and compare the line items. If one quote is far below the others, find out which line item is missing. It is usually tracking, creative volume or senior time.

Run the same exercise for paid search if that is in scope. Choosing a partner for search has its own set of questions, covered in how to choose a paid search partner, and the feed side of shopping has its own logic in why your product feed beats bids.

What should be in the contract before you start?

Put four things in writing: the conversion definition, the reporting cadence, who owns the ad accounts and the data, and what happens when you leave. Account ownership is the one people skip. Your ad accounts, pixel and audience data should stay in your name, with the agency working as a user, not as the owner.

Add a review clause. Agree on the first checkpoint, what will be measured at it, and what each side does if the numbers are not there yet. A contract without a checkpoint turns into a monthly argument.

Next step

Before you talk to anyone, write your scope on one page: platforms, conversion definition, creative volume, reporting needs. Then send that page to every agency you are considering and compare the answers line by line. If you would rather run the campaigns yourself with software doing the setup and the checks, look at what a self-service product actually covers, starting with the Creative Studio page for banners, and see whether it matches the scope you wrote.