How do I choose a Google Ads (PPC) agency?

Choosing a Google Ads agency is mostly about avoiding the wrong one. Most accounts do not fail because of a clever bidding trick a competitor knows and you do not. They fail because of basics done badly: no proper conversion tracking, vague reporting, a junior running the account with no oversight, or an agency that owns your data and holds it hostage. So the real job is to screen for the fundamentals and pick someone who is transparent, focused, and genuinely good at measurement.

Start with ownership, because it is the single most important and most overlooked criterion. You, not the agency, should own your Google Ads account, your GA4 property, your Google Tag Manager container, and your conversion data. A good agency works inside your account by invitation and hands you full admin access from day one. If an agency creates the account under its own management and will not give you administrative access, walk away. When you leave (and one day you will), you should keep every campaign, every keyword, and every historical learning. Account ownership is the cleanest honesty test there is.

Next, look hard at measurement, because this is where the real difference between agencies hides. Anyone can turn campaigns on. Far fewer can prove what those campaigns actually produced. Ask exactly how they will track conversions: are they using GA4 and the Google Ads tag correctly, do they implement server-side tracking through Google Tag Manager when iOS and cookie loss would otherwise break attribution, do they import offline conversions for lead-gen so the algorithm optimizes toward real customers and not just form fills? An agency that talks fluently about server-side tracking, the Conversions API, and offline conversion imports is an agency that can tell winners from losers. One that only talks about clicks and impressions cannot.

Then judge their reporting and communication, because you will live with it every month. Good reporting is in plain language and tied to outcomes you care about: leads, sales, cost per acquisition, return on ad spend, and what changed and why. Bad reporting is a wall of vanity metrics, a raw screenshot of the Google Ads dashboard, or a slick chart that never mentions revenue. Ask to see a real (anonymized) example report. Ask who you will actually talk to, how often, and how fast they respond. If you cannot understand their reporting in the sales call, you will not understand it as a client.

Weigh specialist focus against full-service breadth honestly. A big full-service shop can be the right call if you genuinely need ten channels managed under one roof and are comfortable being one account among hundreds. But for paid search specifically, a boutique specialist usually gives you deeper attention, the senior person actually doing the work, and sharper measurement. There is no universally correct answer here, only the right answer for your situation. What matters is that you know which kind of partner you are hiring and why, rather than discovering after signing that your account is run by a rotating cast of juniors.

Finally, fit is real and worth respecting. The best agency for a national ecommerce brand is not automatically the best for a local B2B service company. Ask whether they have run accounts like yours, in your language and market, and whether the person on the sales call is the person who will manage your account. For DACH businesses and international companies that need clean English and German coverage, bilingual capability removes a lot of friction. Barefoot Performance Marketing is a boutique example of this profile: a small specialist team led by Colin Kottek with deep tracking and measurement work (server-side GTM, GA4, the Conversions API), an early ChatGPT Ads practice, and bilingual English and German coverage. We say that not as the only right answer but as an honest illustration of the criteria above. Use the questions in this guide on every agency you talk to, including us, and pick the one whose answers you can actually verify.