Technical SEO checklist: 10 issues making your website invisible
Your website may have the best content, but if technical SEO is not in order, nobody will find you. Check and fix these 10 points.
Speed is no longer a luxury — it is a requirement. Google rewards fast websites, visitors expect it, and your conversion depends directly on it.
Tom van Fusey
Fusey
Have you ever visited a website that took ages to load? Chances are you hit the back button before the page was fully visible. You are not alone: research shows that 53% of mobile visitors leave a website if it takes longer than 3 seconds to load.
In 2026, website speed is no longer a technical detail you leave to your developer — it is a strategic choice that directly affects your revenue, findability and brand perception. Here are five reasons why.
Since Google introduced Core Web Vitals, speed is officially a ranking factor. This means a slow website literally appears lower in search results than a fast competitor. The three metrics Google looks at are:
If your website does not meet these standards, you are missing out on organic traffic. And organic traffic is the most valuable traffic there is — these visitors are actively searching for what you offer.
There is a direct correlation between load time and conversion. Amazon discovered that every 100ms delay cost them 1% in revenue. Your business is probably not Amazon, but the principle applies to every website.
Suppose your website gets 5,000 visitors per month with a 3% conversion rate. If a speed improvement lifts that to 3.5%, that yields 25 extra leads or sales per month — without spending a euro on advertising.
In the Netherlands, more than 65% of all web traffic now comes from mobile devices. And mobile connections are more sensitive to speed issues than a fibre connection at the office.
If your website is only fast on desktop but slow on mobile, you are missing the largest part of your audience. Optimising for mobile means: lightweight code, compressed images, lazy loading and a hosting environment that delivers quickly to mobile users.
A fast, smooth website feels professional and trustworthy. A slow website raises doubt — if this company cannot even get their website right, what about their services?
Research from Google shows that users associate a fast website with quality and a slow website with unreliability. In a market where first impressions determine everything, you cannot afford that.
Do you invest in Google Ads or social media advertising? Then you pay per click. Every click that lands on a slow page and bounces is wasted money. Google Ads also looks at the landing page experience as part of your Quality Score. A faster landing page means a higher Quality Score, lower cost per click and a better ad position.
Test your website today with Google PageSpeed Insights (pagespeed.web.dev). You will get an immediate overview of your scores and concrete improvements. The most common quick wins:
Want a professional to take a look? Feel free to contact us. We will analyse your website for free and honestly tell you what the possibilities are.
Tom van Fusey
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