The Complete Guide to Open Graph Tags — What Most Developers Get Wrong
You ship a new page. Someone shares it on Slack. Instead of a rich preview card, they see... nothing. Or worse — the wrong image, a truncated title, and a description pulled from your cookie banner. Open Graph tags control how your pages look when shared. Get them wrong and your links look broken. Get them right and every share becomes a mini billboard. This guide covers everything: what each tag does, the mistakes I see on most sites, and how to debug them. What is Open Graph? Open Graph (OG) is a protocol created by Facebook in 2010. It lets you define how a URL appears when shared on social platforms, chat apps, and anywhere that generates link previews. When someone pastes your URL in Slack, Discord, Twitter, LinkedIn, iMessage, or WhatsApp, those platforms fetch your page and look for OG tags in the <head> . If they find them, they render a rich preview card. If not, they guess — and guessing rarely goes well. The Essential Tags og:title <meta property= "og:title" content= "How to
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