twitter cards

Ok so ive been pulling my hair out with the coding of this twitter card. I have set the following proper coding in the head ( I had to alter it a bit so it could be posted but you get the drift) twitter:card content=summary_large_image twitter:title content= twitter:description content=...

Hey, i know how to add "Summary Twitter card" but does anyone know how to get this thing? (pic below) Basically. How do i get "Visit YourDomainNameDotCom"? Thanks :)