grab one, and then you'll see the section that adds the activation metric

Meanwhile, I was wondering, if we chose our own metric for bucketing users into different variants, let's call it "custom_anonymous_id" do all our metrics need to use that one as "anonymous_id" or can we use the default Segment anonymous_id. I'm not sure how GB connects all of the events. Does the bucketing metrics influence that or not at all?

And by bucketing I mean the one where it says "split users by"

but keep in mind, that if the id's have different times to live, you can end up with multiple exposure warnings