How to Avoid the Most Common CMS Website Marketing Mistakes

A Website Is a Marketing Tool, Not a Deliverable

A website is a strange kind of marketing instrument: it has to serve many functions at once, it represents a serious investment for most companies, and the way it usually gets built almost guarantees problems. Paulina Grębowiec describes the familiar pattern - someone at the top decides a new site is needed, hands the job to an external agency chosen mainly on price and turnaround time, and then drops the result on a one- or two-person marketing team with the words “this is yours to run now.” Most of the mistakes that follow are avoidable, she argues, if the site is properly prepared before anyone touches a CMS. To make that preparation concrete, Grębowiec has published a checklist for avoiding marketing mistakes on your website that walks through the elements a site needs to actually function as a marketing tool.

That preparation is the core of what Grębowiec does under the Miara Marketing brand, where she focuses on measuring the real effect of marketing activity rather than assuming it works. If your website draws traffic but not conversions - or simply doesn’t do the job it was built for - it is worth checking your own site against her framework and exploring how a measurement-first approach changes which decisions matter. The diagnostic below follows the three stages where things tend to go wrong.

Stage One: Concept Before Code

Grębowiec is blunt that almost everyone underinvests in the concept stage, even though it defines every later step. The first and most common failure she sees is the absence of a strategy and a defined goal. Before any new site exists, a team should be able to answer three questions: what is it for, who is it for, and what should it achieve. “Competitors have one and the boss wants one too” is not a sufficient reason. Even a team without the budget for a full marketing strategy can sit down in a small group and at least sketch personas - who the site is meant to convince.

The business goal then drives a cascade of decisions, including which CMS is appropriate. A digital business card, an online store, a lead-collection site, and a portfolio all pull in different directions. Her warning about visual design follows the same logic: colours and aesthetics should not be chosen on the basis of what the decision-makers personally like or dislike. The site exists for a specific audience, and that audience is what it has to convince. A premium product needs a premium design, because audiences are good at sensing when a brand is not what it claims to be.

This is also where Grębowiec recommends a competitor analysis: pick around five companies in your exact industry, at a similar scale and with a similar audience, and study how their sites and marketing work - not to copy them, but to understand the space you will operate in.

Choosing the Technology and the CMS

Technology choices belong to the concept stage too, and here Grębowiec’s preferences are clear and worth noting as a perspective rather than a universal rule. She presents WordPress as an excellent default for non-technical teams: easy to operate and widely supported, in contrast to Magento and other systems that demand more specialist attention. The trade-off she names is performance - WordPress becomes less efficient once you stack many plugins onto a store with a large catalogue. SaaS e-commerce platforms built for large stores spread their cost into monthly fees, which often works out more expensive overall. Sites generated by AI tools are fast to produce and ready to use, but hard to integrate with other systems. Fully static sites are fast but awkward to edit for anyone non-technical, which makes them a weaker fit for blogs and content-heavy services.

The practical questions she insists on asking early are unglamorous: a short, memorable domain name without hyphens or odd characters, plus the matching variants and extensions bought and redirected so users still reach you. Hosting sized for the traffic your campaigns will drive, with the second-year price checked rather than the promotional first-year rate. And, crucially, who will actually maintain the site - change product descriptions, add blog posts, swap images - because that answer should influence the CMS choice itself.

Stage Two: Building Without Cutting Corners

The build stage is where neglected UX and accessibility do the most quiet damage. UX, Grębowiec stresses, is not aesthetics - it is walking the user through every step they need to take. A store where no one can find the cart or complete payment is worthless regardless of how it looks. Accessibility standards for contrast, font size, and legibility exist for a reason: an ageing population and users on slower hardware and connections are part of the audience that technical teams routinely forget.

Her measurement bias shows clearly, and usefully, here. A site without analytics works, but it does not function as a marketing tool. Google Analytics, conversion events, and pixels are the baseline, and they should be placed on the site as early as possible. She is candid that a developer is not an analyst - the most you can expect is the tracking code glued onto the site, while configuration of tools and events is work you do on your own or hire for. She also flags social proof (reviews, case studies, links to social media) and the legal layer nobody enjoys: a privacy policy, store regulations, and a consent mode banner that is now not just a legal requirement but a Google one - sites without it configured correctly perform worse in Google Ads. Security rounds it out: an SSL certificate, strong passwords, updated plugins, and backups that have, in her own experience, rescued months of work.

Testing closes the stage, and Grębowiec separates two questions: what you test, and who tests. Sites should be checked across devices and browsers - every button and form, the whole flow. But people who do not work in marketing or technology tend to judge whether they personally like something rather than whether it does its job. Her advice is to trust specialists and data, and to look at the work through the eyes of the intended audience rather than your own. The same discipline applies to SEO: even in an era dominated by AI search results, the basics - meta tags, alt text, headings - still tell tools what a page contains, and page speed still matters, especially since trimming image weight is usually within reach.

Stage Three: Living With the Site

The last cluster of mistakes appears once the site is live. Maintenance costs money - domain, hosting, and updates to both the platform and its content - and the longer technical updates are deferred, the more expensive the eventual fix. Content has to stay current; Grębowiec recounts cases where sales dropped to zero because an “add to cart” button had quietly stopped showing. Access management deserves the same care: generated passwords stored safely, one-time keys, and admin access consolidated on a single account, particularly for Google’s marketing tools, which tie permissions to one address.

The Worst Mistake, and the One That Never Ends

The single error Grębowiec calls the worst is the urge to innovate where no innovation is needed - being different for its own sake. Standards for how things should look and behave exist because users learn them, and you cannot expect to retrain a visitor’s habits; a user who cannot navigate your store will simply leave without converting. It is a strong, slightly conservative claim, and it reflects her vantage point as someone who measures outcomes rather than admires interfaces.

The closing mistake is treating the launch as the finish line. Having a website does not mean marketing now happens on its own - there are too many good sites with long histories and real marketing for that to be true. A live site is the start: it needs a plan for acquiring traffic and a cycle of continuous optimisation across SEO, paid campaigns, social, and automation, each with its own cost and time horizon. If you want a structured way to pressure-test your own site against all of this, download Grębowiec’s checklist and review your pages against it, then explore how Miara Marketing’s measurement-led approach can turn a finished website into one that actually performs. A website is a tool you have to keep working on - there is almost always room to improve, so start by checking where yours stands today.