What can clients expect from a social media marketing agency? Let's look at the expectations that clients have of social media agencies (and what social media agencies need to be clear about providing to customers). Potential clients first start to consider working with a social media marketing agency or practitioner for many different reasons. They might be too busy to manage their accounts themselves while still keeping up with the rest of their day-to-day tasks. They might be worried about the increased demand or activity across multiple social channels as their brand and following grow.