1. Twitter Cards (twitter:*)
• Platforms: Twitter, X (formerly Twitter), TweetDeck, some news aggregators.
• Purpose: Provides rich media snippets when links are shared, including title, description, image, and card type (e.g., summary, player, app).
• Example:
2. Open Graph (og:*)
• Platforms: Facebook, LinkedIn, WhatsApp, Slack, Discord, Reddit, Microsoft Teams, Telegram, and more.
• Purpose: Defines how links are previewed, including titles, images, descriptions, and types.
• Example:
3. Schema.org (itemprop)
• Platforms: Google, Bing, Yandex, and other search engines.
• Purpose: Provides structured data for better search visibility, rich snippets, and enhanced knowledge panels.
• Example:
4. Other Specialized Tags
• Pinterest: Uses og:image and og:description for rich pins.
• Reddit: Often pulls og:title and og:description.
• Discord: Prioritizes og: tags for link previews.
• Slack: Also prefers og: and twitter: tags.
• Microsoft Teams: Uses Open Graph for link cards.
• Telegram: Uses Open Graph for link previews.