Clarification on _idts parameter

Hi folks,

I’d like to ask for more clarification on the meaning of the _idts parameter and how should I handle it when manually tracking with API. The docs says that this parameter is the “timestamp” of the first visit and it’s used to calculate “days to conversion”.

My main question is, is this parameter the absolute date for the first visit (which would be always the same value for a known user) or is it the date from the last goal conversion?

What happens if by mistake I use a different value between visits from the same user?



set to the timestamp of the first visit