How to Choose the Right Google Ads Agency for Ecom

Choosing the wrong Google Ads agency costs you more than just management fees. It costs you months of lost revenue, wasted ad spend, and opportunities your competitors captured while your account stagnated. After 16 years in Google Ads and working with 500+ ecommerce brands, here's how to tell the difference between an agency that will scale your brand and one that will burn your budget.

The 8 Questions to Ask

1. Do they specialize in ecommerce?

Google Ads for ecommerce is fundamentally different from lead gen, SaaS, or local business advertising. You need an agency that understands Shopping feeds, product segmentation, SKU-level optimization, and the nuances of Performance Max for ecom. A generalist agency will apply generic strategies that don't account for how ecommerce customers buy.

2. Can they explain their campaign structure?

Ask them to walk you through their ideal campaign architecture for an ecommerce brand. If the answer is "one PMax campaign and brand Search," run. A proper structure includes Shopping feeders, non-brand Search, segmented PMax, brand protection, and remarketing — each with a clear role in the funnel.

3. How do they handle Shopping feed optimization?

Your Shopping campaigns are only as good as your product feed. Ask specifically about title optimization, attribute enrichment, feed multiplication, and how they handle variant products. If they don't touch the feed, they're leaving significant performance on the table.

4. What does their audit process look like?

A good agency starts with a thorough audit before proposing any strategy changes. They should be able to grade your account across structure, performance, hygiene, and strategy — and show you exactly where money is being wasted. If they skip the audit and go straight to "we'll optimize it," they're guessing.

5. How do they report on Performance Max?

PMax reporting is where most agencies fall short. They'll show you total conversions and ROAS, but won't decompose performance by channel (Search, Shopping, Display, Video). Ask if they can show you what percentage of PMax conversions come from branded queries vs. genuine new customer acquisition.

6. What's their approach to search term management?

Search term management is the single biggest lever for reducing waste in Google Ads. Ask how often they review search terms (daily is ideal), how they handle branded bleed in non-brand campaigns, and what their process is for building negative keyword lists. If the answer is "monthly," that's too slow.

7. Can they show ecommerce-specific case studies?

Look for case studies with specific metrics: ROAS, revenue growth, incremental customer acquisition. Not vanity metrics like "impressions increased 500%." The case studies should be from brands similar to yours in size and category.

8. Do they have proprietary technology?

The best ecommerce Google Ads agencies build their own tools. Account audit engines, search term analyzers, product performance graders, cross-campaign impact analysis — these tools give them visibility and speed that manual management can't match.

Red Flags to Watch For

• ▶"Let the algorithm learn" as their primary strategy — this is code for "we don't know what we're doing"
• ▶No mention of feed optimization or Shopping structure
• ▶They can't explain the difference between branded and non-branded conversions
• ▶Long-term contracts with no performance guarantees
• ▶They manage 100+ clients per account manager
• ▶No proprietary technology — they're just using Google's built-in tools
• ▶They treat PMax as a set-and-forget solution
• ▶They don't review search terms at least weekly

What Good Looks Like

The right agency will audit your account before asking for a single dollar. They'll show you exactly where waste exists and present a clear, structured plan for fixing it. They'll have ecommerce-specific case studies with real metrics. And they'll be transparent about what they can and can't do.

Google Ads is too important and too expensive to trust to the wrong agency. Take the time to ask the right questions upfront. Your future ROAS depends on it.