What a Marketing Agency Does (and How to Choose One)

What does a marketing agency actually do? The short answer: it runs the channels where new customers find your business, mainly paid ads and visibility on Google, and it answers for every dollar it manages with numbers. That is the whole job. Anything else in the proposal, from logo design to video, is a separate service with a separate price.

One honest disclosure before we go on: Addendo is an agency, so read this article knowing that. That is the deal. We wrote these criteria to be useful even if you end up hiring someone else, because an owner who knows how to evaluate agencies signs better contracts. You can see what we do and hold it to the same standard.

"A good agency shows you its weak numbers before you ask for them."

What an agency really does (and what it cannot promise)

The real work is less glamorous than the pitch. A marketing agency researches who you sell to and builds campaigns to put your business in front of that person, with ads and pages written to make her act. Then it wires up measurement. Without that connection nobody knows what each dollar produced, and the monthly report becomes an act of faith.

Nobody controls the exact outcome. Google warns about this in writing in its own SEO documentation: be wary of anyone who guarantees a number one ranking. If someone signs off on rankings or a customer count in the first meeting, they have already lied to you once, and you have paid them nothing yet.

The signs of a good agency

Measurement wired in from month one

Asking for this filters out half the market. Your ad account should measure what actually pays your bills, such as calls and booked appointments, and that connection should be installed within the first weeks of the contract, with proof that it fires before the second payment.

Reports you understand without a translator

If you need a course to read the monthly report, the report is doing a different job. A good one tells you how much was spent and how many leads that spend produced, with the cost of each lead next to it, in words your accountant would follow. It fits on one page.

Everything registered in your name

The ad account and the Google Business listing get created with your email; the agency joins as an invited admin. This point is non-negotiable. When the relationship ends, the campaign history stays with you, and it is worth money: it saves the next agency months of learning paid for with your budget.

The signs to walk away from

The first is the contract that locks you in. Twelve months with an early exit penalty protect the agency from the only judge that matters: your right to leave when the numbers fail to show up. Serious agencies sometimes ask for three to six months to recover setup work, and that is reasonable. Past that, ask what they fear.

The second sign is the promise of results, which Google itself advises against in writing. And then there is the vanity report: impressions and reach go up almost every time spend goes up, so a report built on them looks good however the client is doing. Run from all three.

The questions for the first call

• What will we measure, and where do I see it? The right answer includes a report you can open yourself, with leads and the cost of each one. Vagueness here is vagueness forever.
• Whose name will the accounts be under? You already know the answer you want. Anyone who hesitates here is planning to charge you for leaving.
• Tell me about a client it did not work for. Every agency with history has weak cases, and the one that walks you through a real one is showing you how it handles problems.
• How much of my budget goes to ads and how much to fees? Those are two separate numbers. If a proposal blends them into one figure, ask for the breakdown before comparing anything.

When you should not hire an agency

Our opinion, having told several prospects to wait: if there is no real ad budget left after paying fees, the order is inverted. Start free. A Google Business listing costs nothing, you can claim it yourself this week, and for a business that lives on local customers it will often move the phone more than a half-funded agency plan. This article also will not help you if you sell to two or three corporate clients a year: that game is won on relationships, and digital marketing follows from a distance.

Frequently Asked Questions

How much does a marketing agency charge?

Two models dominate: a flat monthly fee, or fees set as a percentage of ad spend. The ad money goes straight to Google or Meta from your card, and the fees are paid separately; a proposal that merges both amounts keeps you from comparing. Always ask for the breakdown.

How long until I see results?

It depends on the channel. Paid ads generate data in the first week, though stabilizing your cost per customer takes months of adjustments; organic rankings are measured in quarters. Be suspicious of exact timelines, because nobody controls them.

What happens to my accounts if I switch agencies?

If they were created in your name, nothing: you remove the old agency's access and grant the new one's in minutes. If they were created under the agency's name, prepare to negotiate for the return of your own history. That is why this question gets asked before signing.

What to prepare before the first call

Arrive with two numbers of your own: what a new customer is worth to you and how many you can serve per month without drowning. With those two figures, any marketing agency proposal can be judged on a napkin: if bringing in a customer costs more than that customer leaves behind, the plan loses money by design, and no report will hide it.