TAM / SAM / SOM

TAM (Total Addressable Market), SAM (Serviceable Available Market), and SOM (Serviceable Obtainable Market) are three levels of market sizing used in category creation. TAM quantifies the global opportunity for the category, SAM narrows it to reachable segments, and SOM further narrows to those realistically acquirable in the near term. These metrics guide investment, resource allocation, and market launch strategy.