Site Traffic Optimization with Summary Cards - Twitter Developer

Summary Cards

Twitter Summary Cards provide rich, engaging ways to promote your site or content with Photos and Videos as you create new posts on twitter. Although Twitter still supports the addition of media to your tweets, it can be less interactive and engaging.

By leveraging these cards, we can maximize the traffic to your site or blog and increase the optimization and efficiency of your marketing efforts. The cards will render live content via the markup it finds within the pages you reference from your links.

As a publisher, you can easily share things like the Title, Description, Image, and Author of the page you are sharing. 

https://www.technologytobusiness.com/seo/twitter-summary-cards