Have I understood the Twitter Card deep linking correctly?



Im new to using Twitter cards and got interested in it once the deep linking possibility came up. As of my understanding the whole flow works like this:

  1. Have a web page with proper meta tags for twitter cards and app (id, name, custom URL).
  2. Tweet a link to that page
  3. Follower clicks on the link, gets to a website/app
  4. App decides what happens depending on the custom URL (handled in the app).
  5. ??
  6. Profit.

Is this correct?