SEO Glossary
Performance (25 points): Lighthouse performance score, real Core Web Vitals data (LCP, INP, CLS) from CrUX. Accessibility (25 points): WCAG 2.2 AA conformance, Lighthouse accessibility score, semantic HTML and ARIA. SEO (20 points): meta tags, hreflang, sitemap, structured data, mobile-friendliness. Privacy (15 points): GDPR compliance, cookie consent, EU hosting, encryption. Security (15 points): HTTPS, HSTS, CSP headers, Certificate Transparency.
90–100 points: excellent — your website meets all current standards. 70–89 points: good — some individual optimization potential remains. 50–69 points: average — several compliance gaps. Below 50 points: critical — your website risks legal consequences and SEO loss. The mekyn website consistently scores 98–100 MCS points.
Visit mcs.mekyn.com, enter your domain, and receive your score within 60 seconds with a detailed report per dimension. The check runs entirely in the browser (client-side) — no data is stored. For agencies and developers there is a REST API and an embeddable badge for your own website.
You can find a detailed answer in the explanation above. For practical application, we recommend our tools.
You can find a detailed answer in the explanation above. For practical application, we recommend our tools.
You can find a detailed answer in the explanation above. For practical application, we recommend our tools.
Start with a free SEO check — see your score in 60 seconds.