Getting Started with Cards
To get started with implementing Cards markup, specify the type of card for your content by adding the following HTML markup to the HEAD section of the page:
<meta name="twitter:card" content="summary"></meta>
Card properties are simple key-value pairs, each defined in an HTML meta tag as seen above. The combined collection of properties defines the overall card experience on Twitter, and each card type supports and requires a specific set of properties.
All cards have one basic property in common – the card type value:
||The card type, which will be one of “summary”, “summary_large_image”, “app”, or “player”.|
Only one card type per-page is supported. If more than one
twitter:card value exists in the page, the “last” one in sequence will take priority.