I just want to secure AI. DLP vs Info Protection vs DSPM vs Governance vs...

Two things in your follow-up haven't been answered, and the licensing detail you added changes the second one.

First, directly: yes, the one-click policies in DSPM are real DLP policies. Not a separate mechanism. Enable one and it sits in your normal DLP policy list alongside everything else.

Second, the circle you're going round in is real, and it isn't only marketing. Information Protection is the labelling engine. DLP is the enforcement engine. DSPM is the dashboard that assesses posture and switches the other two on for you.
They are different things that all touch the same data, which is why the descriptions overlap.

What makes the docs actively misleading: "DSPM for AI" and "DSPM" have been merged, and both classic solutions retire on 30 September 2026. If one guide shows them as separate and another doesn't, you're reading two generations of documentation at once. Worth knowing the merge is only cosmetic in one respect , the policies themselves are still literally named "DSPM for AI: ..." in the DLP list, which adds to the confusion rather than removing it.

On Business Premium: I looked at a Business Premium tenant with no Purview add-on. DSPM is «fully» there, and the DSPM for AI policies show up in the DLP policy list. More usefully, the default policy "Safeguard sensitive data in Microsoft 365 Copilot interactions" already exists in simulation mode, unenforced, with an Enforce button. So you can see what it would have caught before you commit to anything or buy anything.

Given you only have a couple of Copilot seats, that's where I'd start: open it, read the simulation numbers, and let those tell you whether the add-on is worth it for that customer. Beats deciding from the product descriptions. I wrote up how these layers stack, in Norwegian: https://knutdimmen.no/posts/pureview-1-2-3-del-3/