Grow your ecommerce store · Ads · 3 min read
Google Ads and Marketing Agencies: When an Agency Helps Your Business
Short answer
A Google Ads agency plans, builds and optimizes campaigns such as Search, Shopping and Performance Max, manages bids and budgets, writes ads and reports results. It helps most when you spend enough on ads that expert management saves more than it costs, and when you lack time or skill to manage campaigns well yourself.
Google Ads can put your business in front of people at the moment they search for what you sell. It can also burn money quickly if campaigns are poorly structured. That is why many businesses hire an agency. Here is what an agency actually does, and how to tell whether you need one.
What a Google Ads agency does
- Account structure: organizing campaigns and ad groups around products, services and goals
- Campaign types: Search, Shopping, Performance Max, Display, YouTube and Demand Gen, chosen for your objectives
- Keyword research and negatives: targeting the right queries and blocking irrelevant ones
- Ad copy and assets: headlines, descriptions, images and extensions
- Bidding strategy: choosing and tuning automated bidding toward conversions or revenue
- Conversion tracking: making sure purchases and leads are measured accurately
- Feed management for ecommerce: optimizing product titles and attributes in Google Merchant Center
- Reporting: showing what is working and what is not
When an agency makes sense
- Your ad spend is large enough that small efficiency gains save real money
- You lack time to check campaigns several times a week
- Campaigns have plateaued or become unprofitable
- You need expertise in specific areas like Shopping feeds or Performance Max
- You want to scale while protecting profitability
When to wait
- Your budget is very small, so fees would take a big share
- Your website does not convert well yet; ads will only send traffic to a leaky funnel
- You have not defined what a customer is worth to you
In those cases, start with a simple, well-tracked campaign yourself or hire a freelancer for setup. Our comparison of Google Ads Smart campaigns vs Search campaigns helps beginners choose.
How agencies charge
| Model | How it works | Watch for |
|---|---|---|
| Percentage of ad spend | Fee rises with spend | Incentive to increase spend |
| Flat monthly retainer | Fixed fee | Scope creep or limited attention |
| Performance-based | Tied to revenue, leads or profit | Clear definitions needed |
| Setup fee + retainer | Upfront build, then management | Make sure setup is worth it |
Ask exactly what the fee includes: number of campaigns, creative production, landing page work, reporting frequency.
How to evaluate an agency
- Google Partner status: a basic signal that the agency meets certain spend and certification requirements. It is not a guarantee of quality.
- Relevant experience: ecommerce Shopping campaigns are very different from local service lead generation.
- Audit quality: ask for an audit of your current account. Good agencies find specific issues.
- Transparency: you should see campaigns, search terms and spend in your own account.
- References: talk to clients similar to you.
- Focus on profit: they should ask about margins, not just return on ad spend.
Keep control of the essentials
- Own your Google Ads account, Google Analytics and Merchant Center
- Grant access rather than letting the agency create accounts in their name
- Keep admin access yourself
- Receive regular reports with spend, conversions, revenue and cost per acquisition
Metrics to track
- Conversions and conversion value
- Cost per acquisition
- Return on ad spend, and ideally profit after ad costs
- Search impression share for key terms
- New versus returning customers
Red flags
- Promises of first position for any keyword
- Refusing to share account access
- Reporting only clicks and impressions
- Long contracts with no performance review
Making the relationship work
Share margins, inventory levels and promotions early. Make sure conversion tracking is right before judging performance. Review results monthly. For wider agency advice, see how to hire a marketing agency and ecommerce advertising strategies. If you are curious about local search ads, read Google Maps ads cost per click.
Frequently asked questions
Should a small business hire a Google Ads agency?
If your monthly ad spend is small, agency fees may take a large share of the budget. Learning the basics or hiring a freelancer for setup can make more sense until spend grows.
Who should own the Google Ads account?
You should. Create the account under your business and grant the agency access. That way you keep your data and history if you change agencies.
How long before Google Ads shows results?
Search campaigns can produce clicks immediately, but campaigns typically need a few weeks of data to optimize. Judge performance over a meaningful period.
Platform features, prices and policies change. Check the official help pages linked above before you act on a detail that matters to your store.