TAM (Total Addressable Market)
If you had 100% of the market that your product or service is designed to serve. The ideal.
SAM (Serviceable Addressable Market)
A sub-set of TAM that your product or service will realistically target.
SOM (Serviceable Obtainable Market)
A percentage of SAM. Your goal based on existing competition, industry environment, and your business plan.
These resources provide survey data on consumer behavior and preferences, including demographics, lifestyles, opinions, shopping habits, and more. Pay attention to the survey source (who created, disseminated, and analyzed the survey), survey collection dates, sample size, and sample demographics (e.g., adults aged 18 to 24 in the United States, adults aged 18+ who own a car, etc.).
Consider what kind of data you need. Some databases allow you to create crosstabs to better combine certain questions, answers, and demographics to tell a story.
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