> For the complete documentation index, see [llms.txt](https://docs.aloop.icustomer.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aloop.icustomer.ai/using-audience-loop/overview/channels-and-activation.md).

# Channels & activation

When the Harness decides to act, it activates the right channel — and hands off. Audience Loop is the decision layer; it doesn't run your media or send your email itself.

It activates:

* **Email** — Instantly and SmartLead
* **Paid media** — Meta and LinkedIn
* **Programmatic** — your trade desk

Those tools run the bids, creatives, and sends; Audience Loop owns the decision — who, what, and when — and records every hand-off as a [Decision Trace](/how-it-works/decision-traces.md). That's how the same audience can be routed differently next week: the decision changed, so the channel did too.


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