SEO Checker menganalisis 12 elemen penting: title tag (panjang ideal 50–60 karakter), meta description (120–160 karakter), canonical URL (HTTPS dan format benar), meta robots (noindex terdeteksi otomatis), Open Graph tags (og:title, og:description, og:url, og:image), Twitter Card tags, structured data JSON-LD (WebApplication, Article, FAQPage, BreadcrumbList), dan validitas schema. Setiap elemen diberi status pass, warning, atau fail beserta penjelasan.