Marketing measurement and optimization (MMO) helps B2C marketers measure the business impact of marketing initiatives, determine the optimal mix of channels and marketing tactics, and forecast the results of alternative marketing investments. But to realize these benefits, marketers first must select from a diverse set of vendors that vary by size, functionality, geography, and vertical market focus. B2C marketers should use this report to understand the value they can expect from a marketing measurement and optimization provider and to select one based on size and functionality.