Your Total Addressable Market (TAM). For the most powerful go-to-market strategy, your market differentiator will be clear when you consider your true, total addressable market to your SaaS marketing strategy. Understanding and creating your total addressable market, or TAM, is essential for any SaaS company. A Total Addressable Market (TAM) represents the potential market size for a particular product or service. Step 4: Segment Your TAM ListAfter manually verifying your TAM, you’ll want to segment it into tiers.