Successful marketing and sales in B2B businesses rely on identifying and targeting the right audience, which involves defining the Total Addressable Market (TAM), Ideal Customer Profile (ICP), and buyer personas. TAM refers to the potential market size for a product or service, helping businesses gauge growth opportunities, while ICP describes the ideal companies that would benefit most from a product, thus streamlining sales and marketing efforts for higher ROI. Buyer personas further refine the target by focusing on individual stakeholders within those companies, encompassing their motivations, challenges, and roles in purchasing decisions. These concepts are interconnected, with TAM representing the broader market, ICP narrowing down to the best-fit companies, and buyer personas identifying the key contacts within those companies. By leveraging these frameworks, businesses can strategically focus their resources, improve targeting accuracy, and enhance the effectiveness of their marketing and sales strategies, ultimately driving scalable growth and customer acquisition.