Regular users won't see this card - it's just for us to modify the OpenGraph so that when you share this page on Twitter or Facebook, the links will appear in a nice card style. This is not representative of a real Twitter or Facebook card but it's just to give you an idea of what might appear. You should always check https://cards-dev.twitter.com/validator and https://developers.facebook.com/tools/debug/ before posting. The description comes from the Page Settings > Description so modify that field to change the content. Keep in mind that it should be less than 200 characters.