While freelancers may be able to work faster in some cases, an agency offers a dedicated team of experts who are focused specifically on each area of a project. This level of specialization ensures the highest level of quality, which is the ultimate goal of any project.    An agency places a strong emphasis on communication, which is crucial to a successful collaboration.    When it comes to quality, an agency has a clear advantage. It's almost impossible for a freelancer to be an expert in all areas, including strategy, copywriting, design, and email service provider (ESP) implementation and management.