Before committing a product's real SKU/UPC to a live Amazon listing, build a placeholder test listing first and check its relevancy for the target keyword using Amazon's Recommended Rank inside Helium 10 Cerebro. If the test listing doesn't show up as relevant for the intended keyword, fix relevancy pre-launch (see Search-Find-Buy Relevancy Signal (Small-Scale) and title-keyword edits) rather than discovering the problem after the real listing and Vine reviews are already committed. Sequence used: (1) test listing → Cerebro Recommended Rank check, (2) Amazon Vine Program batch (30 units, fixed regardless of price/category), (3) go live with real SKU/UPC, (4) immediately start PPC. This front-loads the relevancy check that 3-Step SEO Framework (Keyword Research → Build → Validate)'s 'validate' step normally happens after launch.