Create any conversion or audience based on user history, with a little help of Server-Side GTM and Google Firestore. Set up Firestore Web Tag and two test conversions - more than 3 purchases and the previous purchase was made more than a month ago.
In this post I'll show how to make a few API calls using Server GTM Promise API after that generate new event by runContainer API. And at the end pass changed params to Google Ads Remarketing. Viva la Server GTM!