Why it matters
Below 600×315 platforms show a small thumbnail instead of a large card; 1200×630 renders crisply everywhere.
How to fix it
Generate 1200×630 images (export size = { width: 1200, height: 630 } in opengraph-image.tsx).
References
More seo rules
void seo reports 60 rules in this category. What search engines need from the raw response: status codes, titles and descriptions in <head>, self-referencing canonicals, one h1, crawlable links, Open Graph, icons, robots.txt and a sitemap with real dates.
hreflang-not-reciprocalhreflang set isn't self-referencing and reciprocalog-missingRequired Open Graph tags missing (og:title, og:type, og:image, og:url)og-incompleteog:description / og:site_name missing, or og:url ≠ canonicalog-image-invalidog:image isn't a reachable, absolute, raster image within size limitsog-image-metaog:image:width/height missing or wrong, or og:image:alt missingtwitter-cardtwitter:card missingfaviconNo crawlable favicon in a Google-supported formatapple-touch-iconapple-touch-icon missing or not a 180×180 PNG