TL;DR: A good ecommerce SEO agency shows platform-specific case studies, explains their technical methodology without jargon, uses milestone-based payments, and reports on revenue, not just rankings. Any agency that can’t answer these four things on the first call isn’t worth a second one.
Ecommerce SEO is not the same as general SEO. The platforms are different, the technical challenges are different, and the stakes are higher, your organic traffic is directly tied to product sales. Choosing the wrong agency doesn’t just waste your retainer budget; it can cost you rankings that take years to recover.
This guide gives you the exact framework to evaluate any ecommerce SEO agency before signing a contract.
What makes ecommerce SEO different from regular SEO?
The core principles of SEO — technical health, keyword relevance, content quality, backlinks, apply everywhere. What changes with ecommerce is scale and complexity.
A standard five-page business site has one keyword per page and a handful of technical issues to resolve. An ecommerce store with 5,000 products has thousands of URLs competing for attention in Google’s crawl budget, faceted navigation that can generate millions of useless filter combinations, duplicate content from manufacturer descriptions, product pages that go in and out of stock, and category pages that need to rank for broad, high-intent terms while avoiding cannibalization with individual product pages.
Any agency you evaluate should demonstrate they understand this complexity, not in theory, but through specific examples from clients they’ve actually worked with.
The first thing to check: platform-specific experience
Before anything else, ask which platforms they’ve worked on and what specific problems they’ve solved on each. The right answer is specific. The wrong answer is vague.
Shopify has locked URL structures that prevent clean category hierarchies and creates duplicate content through its collection and tag architecture. Magento sites often have serious Core Web Vitals issues from heavy page weight. WooCommerce stores can accumulate database bloat that slows crawling over time. A competent agency has addressed at least one of these problems for a real client and can tell you exactly how.
Ask to see two or three case studies from ecommerce clients specifically, not a local service business, not a SaaS product, not a blog. If their portfolio doesn’t include ecommerce, that’s your answer.
How to read their methodology
A reputable agency explains what they do and why. If they claim a “proprietary process” they can’t share, walk away — there are no secrets in SEO, only execution quality.
A complete ecommerce SEO strategy covers three areas. Technical SEO handles crawl budget, schema markup, site speed, and Core Web Vitals, the foundation that everything else depends on. On-page optimization works across category pages, product descriptions, and internal linking structure. Off-page SEO builds authority through relevant backlinks from industry publications, niche bloggers, and digital PR, not link farms or paid directory listings.
Ask them to describe their first 90 days on a new account. A good agency runs a comprehensive technical audit, maps existing keywords to pages, identifies cannibalization, and fixes the most damaging issues before touching content. If they jump straight to “we’ll write blog posts and build links” without mentioning the audit, they’re running a template service, not a real strategy.
For businesses that want both site architecture and ongoing SEO handled by the same team, our ecommerce service is built around exactly this combined approach.
The reporting question that separates good agencies from bad ones
Ask to see a sample client report before you agree to anything.
Bad reports are full of impressions, keyword rankings for obscure terms nobody searches, and domain authority scores. These metrics look like progress without necessarily meaning anything for your business.
Good reports track non-branded organic traffic (new customers finding you, not people who already know your brand), conversion rate from organic sessions, and organic revenue tied directly to Google Search Console and GA4 data. If an agency can’t show you the revenue their SEO work has generated for a client, they either don’t track it or the number isn’t worth sharing.
You should also ask how they handle a bad month. Any honest agency will eventually face a Google core update that temporarily affects rankings. Their answer to “what do you do when things aren’t going well?” tells you more about the partnership than their pitch deck ever will.
Five questions to ask on the discovery call
Take control of the conversation. These five questions will tell you what you need to know.
Who will actually execute the work on my account? Senior strategists often sell the contract and hand delivery to junior employees. Confirm who your day-to-day contact is and what their experience level looks like.
Do you outsource content or link building? If yes, ask how they quality-control what comes back. Outsourced content mills produce generic text that adds no ranking value. Outsourced link building from the wrong sources can trigger manual penalties.
Can you provide three ecommerce case studies with before-and-after organic traffic and revenue data?
What happens to all assets if we part ways? You should retain full ownership of all content, technical changes, analytics properties, and Google Search Console access from day one.
How do you adapt after a major Google core update? This question has no single right answer — but an agency that says “we always follow Google’s guidelines so we’re not affected” is either lying or doesn’t understand how updates work. They should describe a real situation where they had to adjust strategy.
Good answer
They name a specific person, describe their experience level, and confirm that person is your day-to-day contact from onboarding through to reporting.
Red flag answer
“Our team handles it” with no specifics, or the person selling can’t tell you who will actually do the work once you sign.
Good answer
Either no, or yes with a specific quality control process they can describe in detail — including how they review output before it goes near your site.
Red flag answer
Yes, with no QC detail, or they get defensive about the question. Outsourced content mills produce generic text that adds no ranking value.
Good answer
Specific examples with real before-and-after organic traffic figures and organic revenue attributed to SEO — not just branded search or impressions.
Red flag answer
“We work with many ecommerce brands” with no numbers, or case studies that only show branded traffic growth — that is brand awareness, not SEO.
Good answer
You retain full ownership from day one — all content, technical changes, Google Analytics, and Search Console access. No conditions attached.
Red flag answer
Any hesitation, “it depends,” or mention of retaining anything your business created or paid for. This is a deal-breaker regardless of how good the pitch was.
Good answer
They describe a real situation — a client affected by an update and how they adjusted strategy. There is no single right answer, but there must be a real one.
Red flag answer
“We always follow Google’s guidelines so we’re not affected.” This is either naive or dishonest. Every serious SEO practitioner has navigated a difficult update.
This agency raised 0 red flags
Red flags at the evaluation stage become bigger problems after you sign. A second opinion costs nothing.
Get a free second opinion from BOS.al →Red flags that end the conversation
Some things disqualify an agency immediately regardless of how polished their pitch is.
Guaranteed rankings are impossible. Google updates its algorithm thousands of times a year. Anyone guaranteeing the top position is either selling you something they can’t deliver or using tactics that will eventually get your site penalized.
Very low retainers — anything under £500 or $600 per month, cannot cover a team capable of doing real ecommerce SEO. At that price point, you’re getting automated tools, outsourced content, and spam link building. The damage from cheap SEO can take longer to fix than if you had done nothing at all.
Promises of fast results. SEO for ecommerce typically shows meaningful traction at three to six months and significant ROI at six to twelve. Anyone promising major traffic gains in 30 days is using shortcuts that put your domain at risk.
For more on what a complete SEO service should cover regardless of your business type, read our breakdown of what SEO services should include from a marketing company.
Key Takeaways
- Ask for ecommerce-specific case studies. General SEO experience does not transfer to complex product catalogues, faceted navigation, and inventory management challenges.
- A complete methodology covers technical SEO, on-page optimization, and off-page authority building. An agency that skips the technical audit is running a template service.
- Reporting should track non-branded organic traffic, conversion rate from organic sessions, and organic revenue, not impressions or rankings for obscure keywords.
- Guaranteed rankings, very low retainers, and promises of fast results are disqualifying red flags regardless of how professional the pitch sounds.
- Ask who actually does the work, whether content or links are outsourced, what happens to your assets if you leave, and how they handle a bad month. The answers will tell you everything.
