Meta tags are HTML elements placed in the <head> of your page. They are invisible to visitors but read by search engines, social platforms, and other crawlers.
The most important meta tags are the title tag, meta description, Open Graph tags for social sharing, Twitter Card tags, the canonical link, and the robots directive. Together these tags control how your page is indexed and how it appears when someone discovers it.
The title tag is the most important on-page SEO element. It appears as the blue clickable headline in Google search results and in the browser tab. Keep it under 60 characters and lead with your main keyword.
The meta description does not influence rankings but dramatically affects click-through rate. A well-written description convinces users to click your result over others. Target 70–160 characters and write for humans, not algorithms.
Open Graph tags (og:title, og:description, og:image) control how your page looks when shared on Facebook, LinkedIn, and Slack. Without them, these platforms guess — usually poorly.
Twitter Card tags serve a similar purpose for X (formerly Twitter). Setting twitter:card to summary_large_image enables the large banner preview that dominates the feed.
The canonical tag tells Google which version of a page is the definitive one, preventing duplicate content issues when the same content is accessible at multiple URLs.
Use metatagpreviewer's preview tool to see exactly how your tags will render before publishing. The URL checker can audit an existing page and score it against best practices.