Solved
Email Campaign and Google Ads
So, you have an email campaign. Then you want to serve ads ONLY to those who open that email. How do you do it?
Note: a new audience is generated every day. So a daily email goes out...
Thank you so much!
SanfordWhitemanAccepted solution
Level 10
June 24, 2021
To remarket to people who register an Opened Email, you need to implement a unified end user identifier, i.e. Google User-ID.
This allows the cookie (on the web side) to be linked to the open event (on the Marketo side) — remember, opens do not use cookies. Depending on your volume, you may be able to use a webhook to bind the User-ID to the lead, but if you're talking 100K+ opens per day this isn't feasible and instead you'd need to do a bulk export from Marketo API and then bulk update via the Google API.
As you can probably get from the above, you'll need to involve a dev.