Google Ads
- 1. What a Google Ads agency actually does
- 2. 8 criteria for choosing the right Google Ads agency
- 3. The different types of Google Ads agencies
- 4. How much will a Google Ads agency cost in 2026?
- 5. Agency vs freelance vs in-house: the comparison
- 6. 5 mistakes to avoid when choosing an agency
- 7. How to evaluate your agency's results
- 8. Frequently asked questions
73% of companies working with a Google Ads agency say they don't know how to assess the quality of the work done. The monthly report arrives, the figures look good, but no one in-house really knows whether the account is well managed or whether it could perform twice as well.
Discover everything you need to know to choose, fly, and Evaluate a Google Ads agency in 2026 : the criteria that matter, different agency models, market rates, and the method for measuring if your investment is truly profitable.
What a Google Ads agency actually does
A Google Ads agency manages the entire paid acquisition cycle on the Google platform: strategy, campaign creation, ongoing optimization and performance reporting. His role goes far beyond simple technical configuration.
Our scope of action covers four main missions. The first is the account strategy This involves defining objectives, identifying target queries, structuring campaigns by search intent and allocating budgets between the various networks (Search, Shopping, Display, Performance Max, YouTube). The second is creation We're here to help you: write ads, design extensions, produce visual assets for Display and video campaigns.
The third mission is the’daily optimization : adjust bids, add negative keywords, test new ad variants, monitor Quality Score, analyze search terms. According to HubSpot State of Marketing 2025, Google Ads accounts managed by certified specialists have a 38% lower cost per acquisition than those managed in-house without dedicated expertise.
The fourth is the reporting and consulting Our core competencies include: providing clear dashboards, interpreting data, recommending strategic adjustments (budget, targeting, offering) and monitoring platform developments.
8 criteria for choosing the right Google Ads agency
Choosing a Google Ads agency on the basis of a sales pitch is like recruiting an employee on their CV without an interview. Here are 8 operational criteria to check before signing.
1. Sector expertise
A Google Ads agency that has already managed accounts in your sector knows about average CPCs, queries that convert and seasonality. Ask for specific case studies. A tourism specialist doesn't manage an industrial B2B account in the same way.
2. Certifications and Partner status
The status Google Partner attests to a minimum level of technical expertise and budget management. Premier Partner status, reserved for the top 3% agencies, is a stronger signal. Check directly on the Google directory, not just on the agency's website.
3. Transparent access
Your Google Ads account must belong to you. The agency accesses it via an MCC (My Client Center) link, but you retain ownership of the data, history and Quality Score. This is non-negotiable. If an agency refuses to give you administrator access, walk away.
4. The quality of the initial audit
Before signing, a good Google Ads agency offers a audit your account or your market. This audit reveals your analytical skills. A serious audit identifies 5 to 10 concrete, quantified problems, with a prioritized action plan. An audit that limits itself to «there's potential» is a warning signal.
5. The pricing model
Models vary: percentage of media budget (10-20%), flat rate (€500 to €3,000/month), performance, or hybrid. Each model has its biases. Our guide to Google Ads cost details the benefits and risks of each approach.
6. Optimization frequency
A high-performance Google Ads account requires at least weekly adjustments. Ask concretely: how much time is spent on your account each week? What optimization actions are carried out? How often are negative keywords updated? Serious agencies document their work.
7. Reporting and communication
Demand monthly reporting that goes beyond raw metrics. A good report explains the «why» behind the figures, identifies trends and proposes concrete actions for the following month. The frequency of contact points (weekly or fortnightly) should be contractually defined.
8. Dedicated contact
You need to know who manages your account on a day-to-day basis. Not a sales rep, not an account manager overseeing 40 customers. An identified traffic manager, with his or her name, background and availability. Agency turnover is high: include a continuity clause in your contract.
What 10 years of campaign management have taught us at Digitalised is that the most predictive criterion for the quality of a Google Ads agency isn't its size or its Partner status. It's the quality of the questions she asks on the first date. An agency that starts with «What's your budget?» is thinking about billing. An agency that starts with «What is your target customer acquisition cost and margin per customer?» Think performance.
The different types of Google Ads agencies
Not all Google Ads agencies are alike. Four profiles coexist on the French market, each with its strengths and limitations. Identifying the right profile for your situation can save you 6 months of disappointing collaboration.
A pure SEA agency is the best choice if your needs are limited to Google Ads (and possibly Meta Ads). It makes its living from advertising performance, and doesn't try to sell you ancillary services. The 360° agency is ideal for companies that want to centralize their digital strategy, But the risk is that PPC's expertise will be diluted in a larger whole.
Growth agencies are attractive for their test-and-learn approach, but beware: not all of them master the specifics of Google Ads as well as specialized SEA agencies. Sector-specific agencies are ideal if you operate in a regulated or highly specific sector (healthcare, finance, high-end tourism).
How much will a Google Ads agency cost in 2026?
Management fees for a Google Ads agency in France range from €500 to over €5,000 per month in 2026, depending on pricing model, account size and level of service. This budget is in addition to the media budget paid directly to Google.
For a detailed analysis of the different pricing models and the factors that influence the Google Ads cost, For more information, see our 2026 tariff guide.
For one of our customers in the tourism sector with a budget of €12,000 per month, switching from an agency billing 8% of the budget (€960/month) to our hybrid model (€1,200 fixed price + variable on ROAS) generated a 45% increase in conversions in 3 months. The previous agency optimized once a month. We work on the account 3 to 4 times a week. The price difference is €240, but the ROAS is nothing like that.
Does your current Google Ads agency really deliver?
We audit your account free of charge and identify the performance levers your current service provider is not exploiting.
Agency vs. freelance vs. in-house: the comparison
You have three options for managing your Google Ads campaigns: hire in-house, call in a freelance consultant, or mandate a Google Ads agency. The right choice depends on your budget, the complexity of your account and your internal resources.
The major advantage of a Google Ads agency lies in benchmarking. By managing dozens of accounts, it has a comparative vision that neither a freelancer nor a lone employee can have. They know what a CPA of €45 is worth in your sector, they're aware of seasonal trends before they appear in your data, and they've already tested the strategies you're considering.
Our conviction at Digitalised: the right question is not «agency or freelancer?», but «What level of maturity does my account require?». A €1,000 monthly budget on a local market doesn't require an agency. A competent freelance consultant will do an excellent job. On the other hand, a multi-country account with a €30,000 budget, 15 campaigns, and cross-device tracking challenges requires a structured team with data, creative, and technical specialists.
5 mistakes to avoid when choosing a Google Ads agency
After auditing over 50 Google Ads accounts managed by other agencies, we have identified 5 recurring errors in the selection process. Here they are, in order of frequency.
1. Choose the lowest price
A €300-a-month Google Ads agency can't devote more than 2-3 hours to your account. At this rate, optimizations are superficial. The budget wasted on unqualified clicks often costs more than the difference in rates between a low-cost agency and a serious one.
2. Do not verify account ownership
If the agency creates your Google Ads account under its own MCC without giving you administrator access, you're a prisoner. The day you change providers, you lose your performance history, accumulated Quality Score and built audiences. Demand proprietary access from day one.
3. Rely on promises of guaranteed results
«Page 1 guaranteed» or «ROAS of 5 guaranteed» are warning signs. No serious Google Ads agency can guarantee a precise result, because bidding depends on the competition, the quality of your offer and your site. A competent agency commits to a method, a frequency of optimization and transparency of results.
4. Ignore tracking and attribution
According to BrightEdge Research 2025, 41% of Google Ads accounts use incomplete or poorly configured tracking. If conversion tracking is faulty, the agency is optimizing blind. Before judging your agency's results, make sure that the technical setup (Google Tag Manager, Google Ads conversions, GA4) is reliable.
5. Sign a long-term commitment without an exit clause
A 12-month commitment with no possibility of early termination locks you in, even if results are poor. Prefer 3-month renewable contracts, with 30 days' notice. This gives the agency time to prove its worth, while protecting you if the collaboration doesn't work out.
How to evaluate the results of your Google Ads agency
Evaluating a Google Ads agency is based on 4 complementary dimensions: financial performance, technical quality of the account, strategic proactivity and quality of the relationship. Monitoring clicks and CPC is not enough.
Performance metrics to track
- CPA (cost per acquisition) the key metric. How much each lead or sale via Google Ads costs you. Compare this to your margin to assess profitability.
- ROAS (Return on Ad Spend) ROAS: relevant for e-commerce. A ROAS of 4 means €4 of sales for €1 invested. But beware of the attribution window used.
- Conversion rates A stable or rising rate indicates that the agency is improving targeting. A decreasing rate despite an increasing volume of clicks is a warning signal.
- Average Quality Score A good indicator of the quality of technical work. An average QS above 7 means that the agency is taking care to ensure the relevance of ads and landing pages.
Qualitative signals to watch out for
Beyond the numbers, evaluate your agency's proactivity. Does it offer regular tests? Does it point out anomalies before you see them? Does it adapt its strategy when the market changes? A Google Ads agency that simply maintains the status quo doesn't justify its management fees.
Request read access to your account and check the modification history. A well-managed account shows dozens of modifications per week: bid adjustments, addition of negative keywords, ad testing, extension modifications. An account with 2 changes per month is not managed, but monitored.
On an industrial B2B account that we took over after 18 months of management by another agency, the monthly report showed a CPA of €85 and a ROAS of 3. Correct on the surface. But when we audited the account via our audit method, we discovered that 35% of the budget was going to off-target queries due to a lack of negative keywords. After restructuring, the CPA dropped to 52€ in 6 weeks, without any budget increase. The problem wasn't the market, it was the management.
Frequently asked questions about Google Ads agencies
How do you know if a Google Ads agency is competent?
Three reliable indicators for evaluating a Google Ads agency. Ask for case studies with quantified results in your sector (CPA, ROAS, volume of conversions). Check for Google Partner or Premier Partner certification, which guarantees a minimum level of competence and managed spend. Evaluate the quality of the initial audit: a competent agency will identify specific problems and propose a costed action plan before signing. Beware of agencies that promise results without having analyzed your account.
Should you choose a Google Partner agency?
The Google Partner badge is a positive signal, but not enough. It guarantees that the agency has passed Google Ads certifications, manages a minimum volume of ad spend (10,000$ over 90 days) and achieves an optimization score of 70%. Premier Partner status is more selective and reserved for the top 3% agencies by country. Some excellent agencies do not maintain their badge by choice, notably because Google's optimization score sometimes pushes them towards recommendations that serve Google more than the advertiser.
How long does it take to see results with a Google Ads agency?
The first results appear between 2 and 4 weeks for Search campaigns on high intent queries. Full optimization takes 2 to 3 months: the first month is spent structuring the account and collecting data, the second optimizing bids and Quality Score, and the third scaling profitable campaigns. For Performance Max campaigns, allow 4 to 6 weeks for learning before drawing reliable conclusions.
Is it easy to change Google Ads agencies?
Yes, as long as you own your Google Ads account. Check this point before signing: the account must be created under your email address or MCC. If the agency has created the account under its own MCC without giving you administrator access, you risk losing history, Quality Score and conversion data during the transfer. The transition usually takes 1-2 weeks and includes an audit of the existing account by the new agency.
What's the difference between a Google Ads agency and a consultant?
A Google Ads consultant is an independent expert who works alone, often on a part-time basis, and charges between €400 and €1,500 per month. A Google Ads agency has a multidisciplinary team (traffic manager, data analyst, UX designer, copywriter) and ensures continuity of service. For budgets under €3,000 per month, one consultant may suffice. Beyond that, an agency's depth of expertise and production capacity become a decisive advantage.
What certifications should I look for in a Google Ads agency?
The key certifications are : Google Ads Search, Display, Shopping, Video and Measurement. A full agency should hold at least Search and Measurement. Google Partner status attests that the agency keeps these certifications up to date and manages a significant volume of budget. Check directly on the official directory (ads.google.com/partners) rather than relying on the badge displayed on the agency's website.
Looking for a Google Ads agency that really delivers?
Before comparing quotes, find out what your current account is really worth. Our free audit identifies untapped performance levers and quantifies growth potential.
A specialist in digital acquisition, Julia helps companies optimize the creation of digital content. She deciphers Google Ads strategies and paid marketing trends to help decision-makers invest more effectively.