We have to send an event Id while sending conversion request to the Pinterest.EventiD is a unique id string that identifies this event and can be used for deduping between events ingested via both the conversion API and Pinterest tracking. Without this, event’s data is likely to be double counted and will cause report metric inflation. Third-party vendors make sure this field is updated on both Pinterest tag and Conversions API side before rolling out template for Conversions API.
Points to remember
1.Identical event ID – A person navigates to a webpage and a Page visit conversion is fired by both the Pinterest Tag and the Pinterest API. The two conversions will need to have matching event_ids sent back so our system recognizes they’re the same conversion.
2.event_ids need to be unique for different conversions – A person navigates to a webpage and a Page visit conversion is fired by both the Pinterest Tag and the Pinterest API. The person then adds a t-shirt to their cart, which triggers the AddToCart event to fire on both the Pinterest Tag and the Pinterest API. While the event_ids fired for the same events need to match, the event_ids being sent for the Page visit event and the AddToCart event need to be unique. This way our system recognizes them as separate events.