The verification

Meta reviews the companies that operate on its business APIs on behalf of other businesses. This is what that review covers, and what it does not.

Tech Provider is Meta’s compliance review for companies operating on its business APIs on behalf of other businesses.
Cresva can call Meta's Marketing and Business APIs on behalf of a business that has granted it access, rather than only on its own account. The permissions this review gates include ads_management, ads_read and business_management, which are the ones advertising work runs on.
The review is what distinguishes a tool operating on its own advertising from one operating on a client's. Scopes are still granted per business, per permission, at connection time.
Four things this review is routinely read as, and is not. Meta documents the verification process separately from what it permits.
That is a separate directory programme with its own criteria, aimed largely at agencies and resellers. Tech Provider is a compliance review of platform access. The two are frequently confused and are not the same designation.
Meta reviews eligibility to operate on its APIs. It does not evaluate the product, rate it against alternatives, or recommend it.
Meta states that access verification is independent of App Review. Each permission must still be approved for Advanced Access separately before a user outside the app's own roles can grant it. Passing this review does not approve a single permission on its own.
It is not SOC 2, ISO 27001 or any audited attestation. Cresva holds none of those. See the security page for what is and is not in place.
Access is granted per business and per permission at connection time, and can be withdrawn from Meta Business Manager at any point.