Advertisers have the option of including their ads in the Quora Digest email. The Quora Digest is an email sent to opted-in users of Quora. If you choose to include email targeting, it will be included in your suggested bid.
If you opt into email targeting, your ads will appear in desktop and mobile Digest emails sent to registered Quora users.
Note: Quora Digest placements are only available to Text and Image Ads at this time.