This document provides a checklist of questions to ask when hiring or evaluating a digital marketing agency. It outlines 8 key questions to ask, including whether the agency has experience in your industry, can provide references and case studies, what core and additional services they offer, how they measure and report on success, and whether they will integrate with your systems. It also provides a separate checklist of 5 additional questions for evaluating an existing agency, such as how they are measuring results, how often they provide reports, the level of work they should be doing, if they discuss new solutions, and how campaigns are managed.