Written by
Daniel van Hek
Search Clicks·August 14, 2026
10 min read
When you think of a web design agency, you often think of visuals first. Fair enough. But in practice, online growth is almost never about design alone.
You want your website to do work for your marketing and sales. Think: visibility, relevant visitors, a clear path to contact, and a system for adjusting based on data.
That is why we always look at the combination of three things:
In short: a good web design agency does not build a website. It builds a commercial system, including a measurement plan.
Be critical, but smart. You do not need to know how the code works for every supplier. What you do want to know is whether they understand how a website performs in real life, and how they prove it.
A site must be found and understood by search engines. That starts with basic management in Google Search Console.
A professional agency has a clear process for:
Search Console explicitly describes this as a core activity too, including checking index coverage and submitting and monitoring sitemaps. (support.google.com)
Checklist question for the agency: “How do you make it clear whether new pages are actually getting indexed, and what do you do when that does not happen?”
If you do not hear a concrete process in response, that is usually not “too busy”, but a risk signal.
You can only optimize when you know what is happening. That is why your web design agency should work with your measurement plan from day one, not afterwards.
In Google Analytics 4, conversions are linked to events. Google describes conversions as being created from events and used to measure important actions consistently. (support.google.com)
Practical translation:
Google also provides technical guidance on setting up events in GA4. (developers.google.com)
Checklist question for the agency: “Which conversions do you measure by default, and how do you make sure they match what our sales team actually values?”
Trade-off, to be honest: too many conversions creates noise. You may measure everything, but you steer less precisely. We usually advise a small set of “Key Events” (as Google handles them in the GA4 context) that represent the commercial path, and then expanding once it works.
Many sites are “responsive”, but still feel slow or awkward on mobile. That is a waste, because you lose exactly the traffic you are trying to win with SEO and SEA.
Google recommends responsive design as a simple pattern for serving the same HTML on the same URL, with display based on screen size. (developers.google.com)
Checklist question for the agency: “How do you really test mobile, not just one screen width?”
A mature approach is to review content, buttons, forms and loading speed screen by screen. Structured data and other indexing-relevant elements also need to be consistent on mobile and desktop. (developers.google.com)
Let us keep it practical. Below are the choices that do not just make your web design agency look good, but that demonstrably help your online marketing.
Your site is both your catalog and your sales story. That is why you design not only pages, but also:
This works because both SEO and SEA perform much better when the user sees immediately after clicking what they came for, with a clear next step.
A conversion often does not grow through “more text”. It grows through less doubt.
A landing page should usually have one primary Call to Action (CTA). For example: contact us, request a quote, or schedule an appointment.
It helps enormously to:
Trade-off: yes, this makes your pages simpler. But simplicity is exactly what helps conversions. If you try to sell everything at once, nobody wins.
Conversion Rate Optimization (CRO) starts during design and development. Not only once you have already had traffic for months.
In practical terms, this means:
And if you connect this to SEO and SEA, you get a clear picture of where the funnel leaks.
Be honest about limitations: tracking is never perfect. Forms can depend on browser behavior. Cookie settings change. Ad blockers exist.
Still, you can improve a lot by measuring consistently. In GA4, events and conversions are linked so important actions are measurable, even across channels. (support.google.com)
Many organizations do this in fragments: someone builds the site, then SEO comes later, then SEA, and eventually CRO. The result: you keep optimizing afterwards. It feels fast, but in the end it costs you budget and time.
We recommend an integrated approach, with web design as the foundation.
SEO here mainly means: the right pages for the right questions, with a technical foundation that helps.
A web design agency that takes SEO seriously designs:
If you want to know more about how to translate SEO into lead focus, also read Marketing SEO: how to get more leads with Google.
And if you want to get started with an approach for choosing an agency, SEO agency: how to take the smart approach for more leads is a useful framework.
SEA is about speed of learning. But SEA can only run well if your landing pages are relevant and measurable.
What works in practice:
If you are looking for strategies, take a look at Google Ads SEA: Search engine advertising strategies.
For e-commerce, it is often more specific, and then Google Ads Shopping: optimized e-commerce advertising fits your preparation well.
Your website is the start of Lead Generation. Then comes lead qualification and follow-up. That is why your agency also needs to understand how the next step in the process fits in.
The best sites have a rhythm: faster response, fewer errors, better follow-up questions. That is not glamorous, but it is where deals are won or lost.
If you are thinking about using an agency-wide approach around marketing and sales, Internet Marketing Company: services, specialisms and choices fits that way of thinking well.
All right, now for the real work. You have had conversations. You have quotes. What now? You want to avoid ending up with a beautiful site that does not measure and does not convert.
You do not want a mood board, you want a route.
For example, ask:
An agency that only “builds and walks away” gives you a problem instead of a solution.
You want a plan for:
And yes, that means you also provide inputs. Be honest about that. No agency can make good choices without your product and sales knowledge.
A quick test:
If they cannot, you will end up adding a measurement layer later anyway. That is more expensive and often less consistent.
By automation here we mean software, AI or workflows to make online marketing and sales activities smarter. Think of:
But, and this is important, automation must not independently change budgets, contracts or financial decisions without human approval. If the agency wants to “just do that” in a complex way, slow down.
You do not need months of brainstorming. You can already take sharp steps this week.
Record which actions really have value for you. For example:
Then connect events and conversions to those actions, so your measurement plan is correct. Google describes conversions in GA4 as being created from events and measured consistently. (support.google.com)
Check Search Console for indexing and sitemaps. Google explicitly names these kinds of activities as top tasks for users. (support.google.com)
This is not about “finding fault”. This is about gathering information so you do not design blindly.
Not based on “who looks like the nicest agency”.
You want answers to:
A web design agency is only good if it helps make your online marketing and sales goal-driven. That means: technical foundations, a commercial page model, clear CTAs, and a measurement plan you actually use.
When you sit down for a conversation, ask the same core questions. Ask about indexing follow-up, ask about events and conversions, and ask about optimization after launch. The answers will show you in one round whether you are talking to a build party or a growth partner.
And sure, a nice site is nice. But the real win is in what the site does, not just how it looks. (Marketing is not an interior design project, after all.)
Additional reading links that fit this topic, depending on your channel choice:
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