Technical SEO checklist for 2025

May 18, 2025
7 min read
Marketingzeker

Essential technical SEO aspects every website needs for better rankings.

Imagine this: your website showcases brilliant content, but nobody finds you. Your rankings stagnate while technically inferior competitors surge ahead. Frustrating? Absolutely. But here's the silver lining: technical SEO problems are entirely solvable when you approach them systematically. The reality is that Google in 2025 is stricter than ever. Websites that aren't technically sound simply don't get a chance anymore. That's why this checklist is essential for every Dutch entrepreneur who wants to compete seriously online. Core Web Vitals: your website performance yardstick Google has set clear boundaries for user experience. These numbers literally determine whether your website deserves to rank high. Largest Contentful Paint must stay under 2.5 seconds - this is the time your main content becomes visible. Takes longer? Then you lose visitors before they even see what you offer. First Input Delay under 100 milliseconds ensures buttons respond immediately when users click them. Nothing is more frustrating than a slow, unresponsive website. Cumulative Layout Shift under 0.1 prevents elements from unexpectedly jumping while people are reading. Important: these metrics are measured with real user data, not just in test environments. A Haarlem e-commerce store increased conversions by 156% after optimizing their Core Web Vitals, reducing bounce rate from 67% to 23%. Speed optimization that actually works Dutch users are impatient. Therefore, compress images to WebP format - this reduces file sizes by 25-50% without quality loss. Minimize your CSS and JavaScript files by removing unnecessary code and combining files. Browser caching lets returning visitors load your website lightning fast. Implement a CDN that serves your content from Dutch servers for optimal speed. Lazy loading ensures images only load when users scroll to them - this saves bandwidth and significantly speeds up initial load time. A Utrecht technology company saw their Google rankings improve by 40% after implementing these speed optimizations, with page load times dropping from 4.8 to 1.6 seconds. Mobile-first: thinking like your customers Google primarily indexes your mobile version. Logical too, since 70% of Dutch searches happen on smartphones. Your responsive design must work perfectly on all screen sizes. Buttons must be large enough for thumbs, text must be readable without zooming. Pay special attention here: mobile load times are crucial for conversion. Every second of delay costs you 7% of potential sales. Test regularly how your website performs on different devices and connection speeds. An Amsterdam restaurant discovered their reservation system was completely broken on mobile devices, costing them 45% of potential bookings until they fixed the responsive design issues. Crawlability: showing Google the way Your robots.txt file is like a roadmap for Google. Optimize this to give important pages priority and exclude unimportant sections. Your XML sitemap must always be current - add new pages and remove outdated URLs. Internal link structure helps Google understand your website hierarchy. Every important page should be reachable within 3 clicks from your homepage. Breadcrumb navigation shows users and search engines where they are in your website structure. A Groningen manufacturing company increased their geïndexeerde pagina's by 89% after restructuring their internal linking and implementing proper breadcrumb navigation. Schema markup: structured data that converts Structured data helps Google create rich snippets. Organization schema shows your business information directly in search results. Product schema displays prices, reviews, and availability - this significantly increases click-through rates. For local businesses, LocalBusiness schema is worth its weight in gold. FAQ schema can ensure your answers are prominently displayed. Review schema shows star ratings in search results, directly influencing click behavior. A Tilburg law firm saw their click-through rate increase by 127% after implementing proper schema markup, including FAQ schema for common legal questions. Security and trust building SSL certificates are no longer optional. Google marks websites without HTTPS as unsafe, which undermines trust. Solve mixed content problems by ensuring all elements load via HTTPS. Security headers protect against XSS attacks and other threats. This shows Google that your website is professionally maintained. A Rotterdam financial services company saw their rankings improve after implementing comprehensive security measures. Dutch SEO specifications For multilingual websites, hreflang tags are essential. These tell Google which language version to show to which users. Dutch hosting servers ensure faster load times for local visitors - every millisecond counts. Local schema markup with your Chamber of Commerce number and Dutch postal codes helps with local rankings. This is especially valuable for businesses serving regional customers. Technical monitoring prevents disasters Technical SEO isn't a one-time action. Perform monthly audits to detect problems early. New updates can cause unexpected technical issues that could tank your rankings overnight. Regular monitoring of Core Web Vitals, crawl errors, and indexation status keeps your rankings stable. Because in a competitive Dutch market, you can't afford to neglect technical details. Your technical SEO action plan Start with Core Web Vitals - this has the biggest impact on rankings. Work systematically through the list, but focus first on elements currently slowing your website down. Our technical SEO expertise helps Dutch businesses perfectly configure all technical aspects. Because technical perfection is the foundation of online success. Want to ensure your website meets all 2025 technical requirements? Which technical challenge is currently your biggest obstacle to better rankings?

Tags for Technical SEO checklist for 2025:

Technical SEOCore Web VitalsWebsite Performance

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