This is not a takedown. Ads Manager is a serious tool, and Liaison talks to it through the same Marketing API you would use yourself. The honest question is narrower: which one should be open on your screen at four in the afternoon when a campaign is drifting?
What Ads Manager owns
Ads Manager is the source of truth. It has every setting Meta exposes, every breakdown, the full audit surface, and deletion. Anything structural or irreversible belongs there, and Liaison deliberately does not compete: the write layer cannot delete anything, and when you need to, the card hands you a link to Ads Manager instead.
It is also where Meta ships new features first. If something appeared in the platform last week, Ads Manager has it and every third-party tool is catching up.
What the chat does better
Questions with a shape
"Which creative brings the cheapest leads this month, and what is leaking?" is a question, not a report configuration. In Ads Manager it becomes a columns-and-breakdowns exercise. In Liaison it is a sentence, and the answer arrives as tiles, a ranked creative strip, and one paragraph naming the best creative, the worst one, and the difference between them.
Changes you can read before they happen
A change in Liaison arrives as a card with the exact diff: old value, arrow, new value, with the audience drawn on a live map and the reach estimated before anything ships. Everything is born paused. Nothing reaches Meta until you press Confirm, and once applied, the old value stays on the card behind an Undo.
A team feed instead of an archaeology dig
Ads Manager keeps a change history you can dig through. Relay is a feed you actually read: who changed what, when, with the diff inline and a comment thread under it. Changes made directly in Ads Manager show up there too, so the record is complete even when someone bypasses the chat.
Where each one wins
- Daily numbers, weekly decisions: the chat. It is faster to ask than to configure.
- Structural setup, pixels, catalogs, billing: Ads Manager.
- Routine repeated changes: the chat, through quick actions.
- Anything you cannot undo: Ads Manager, deliberately.
- Explaining last week to a colleague: Relay.
The honest trade-offs
Liaison is an agent, and agents can be wrong. That is exactly why the write layer is built the way it is: two phases, paused by default, your Confirm in the middle, Undo after. If you would rather not have an AI anywhere near your account, that is a coherent position, and Ads Manager is right there.
There is also a coverage question. Liaison covers the surface most advertisers touch weekly: campaigns, ad sets, ads, budgets, audiences, creatives, leads. It does not attempt every corner of the platform, and it should not.
How they work together
Most teams end up with the chat open for the daily loop and Ads Manager open for the deep edits, with Relay as the shared memory between them. That is the arrangement Liaison is designed for. It never asks you to abandon the platform tool; it asks fewer clicks of you between the question and the answer.