Click on your profile image up to the right
Click on Settings
Click on Branding in the menu to the left
After a document is signed by a recipient, they can be redirected to any webpage you'd like, such as a thank you webpage or a catalog of your other products and services. To do so, go into Branding, find where it asks for a redirect URL, and type the URL you'd like signers to be forwarded to after they sign.
It will save automatically and be indicated with a green line.