Compare is a Data Dive function that re-runs or compares a previously-built niche against itself over time (e.g. month over month), surfacing movement in competitor sales, search terms, and search volume rather than a static one-time snapshot.
Use it to periodically check an existing niche: which competitors are gaining or losing share, and which search terms moved significantly in volume. A sharp move in a keyword's volume is the trigger for the Keyword Ecosystem Validation seasonality-vs-auto-fill diagnostic — Compare tells you that something moved, that diagnostic tells you why. It's also the natural prompt for Data Dive Competitor Set Curation maintenance: a niche whose competitor rankings have shifted is a niche whose ASIN set may need adding or pruning.
Из тем: Product Research & Validation