Twitter card [options]

i think, this is 6 optons for Twitter cards on site!

1) Summary

The Summary Card is a general card that let's you preview content within a tweet. It will adjust it's appearance based on the size of the preview image available.

This is for: com_content, yoo zoo, k2, etc

2) Product

The Product Card is tailored towards previewing products in a tweet and has two customizable fields for product details.

This is for: JoomShopping, VirtueMart, etc

3) Photo

The Photo Card will present a preview of an image within a tweet that can be viewed in the Twitter image viewer.

This is for: DatsoGallery, etc

4) Summary Large Image

The Summary Card is a general card that let's you preview content within a tweet. It will adjust it's appearance based on the size of the preview image available.

This is for: com_content, yoo zoo, k2, etc

5) Player

The Player Card is specifically designed to playback video and audio content. Because this content is streamed, additional restrictions apply to this card. See dev.twitter.com for details.

This is for: Jommla video gallery modules, or something

6) App

The App Card is designed to work with the major Mobile App Stores and present preview information about a specific mobile app.

This is for: option for link on mobile app Android/iOS

p.s. at this time, i'm see only "Summary" in JFB.