What it does

Segment sends track / identify / group calls into a Segment source. Acts as a 1:N fan-out hub — once you connect Segment, any destination enabled on that source receives the data.

Setup

In Segment → Sources → [your source] → Settings → API Keys, copy the Write Key.
In FlowFn, go to Platform Tools → Segment → Connect and paste it as api_key.

Actions

Track, Identify, Group

Notes

Every call needs either user_id or anonymous_id (Segment's rule).