Optimizing Your OG Tags for Facebook
Facebook's link preview uses og:title (max 60–90 chars displayed), og:description (max 200 chars in mobile feed), and og:image (must be at least 200×200px, optimal 1200×630). Edge cases: Facebook caches OG data aggressively — if you update tags, use the Facebook Sharing Debugger to force a cache refresh. Also note: og:image:width and og:image:height hints speed up rendering.