Straight out of a small developer get-together in San Francisco, Twitter unveiled two new features (really one in two) to advance the social network as a whole. First in Twitter-specific markup, a tweet will feature an application’s name, icon, description, rating and price within the freshly unveiled App Card and link to its Google Play or App Store page, for convenience. The opposite of this is Product Cards which highlights merchandise with an image, price and ratings.
Likewise, when tweets link to a photo gallery on the web, Twitter will use a Gallery Card to display a collection of four photos, indicating that it points to an image set, and not just a lone picture — something of quantity and quality.
Last;y, Twitter rounded off the cards with “mobile app deep-linking,” which means that tweets can sport a download link for the app which was used to publish them — Flickr, Foursquare, Path, Vine, etc. — and can create new features as a result.