Knowing how to choose a marketing agency is one of the most valuable skills a business owner can develop, because a bad choice is expensive in ways that go far beyond the monthly retainer. When you contact a digital marketing agency for the first time, pay close attention to how they listen. Do they ask questions about your business before talking about their services? Do they speak in plain language rather than hiding behind jargon? Can they point to results in your sector or in businesses of a similar size? Red flags include guaranteed rankings, vague reporting, and lock-in contracts that make it difficult to leave. Green flags include transparency, a clear onboarding process, and a willingness to set realistic expectations from the very first call.