Promoted App Pins make it easy for people to discover and download apps, directly from Pinterest. When someone clicks on a Promoted App Pin, they can download their new app without having to leave Pinterest.
Specs & Tips:
Same specs as standard promoted pins:
File type: PNG or JPEG
Max file size: 32 MB
Aspect ratio: 2:3 or 1000 x 1500 pixels
Text: Title: Up to 100 characters
Description: Up to 500 characters. Only the first 50-60 characters show in the feed.