`Persona: Imagine you are an experienced Product Manager with expertise in market sizing and research for technology products.` `Action: Describe the approach to estimating the Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for a [product type].` `Context:` `Product Type: [Provide a description of the product, including its main features, functionality, target audience, and potential use cases.]` `Market Landscape: [Briefly describe the current market landscape for the product type, including key competitors, trends, and challenges.]` `Format: Provide a step-by-step guide to estimating TAM, SAM, and SOM for the product type, including specific research sources and methods for each stage.`