Your product copy or landing page makes a claim (e.g., "world's best", "FDA approved", "100% natural") that isn't substantiated by visible evidence on the destination page.
Superlatives without proof, health/efficacy claims for supplements, "#1 rated" without sourcing, or guarantees not backed by terms on the page. Microsoft requires claims to be either toned down or supported with verifiable third-party citations on the landing page.