To determine if an SEO agency truly understands the St. Louis market, look for these indicators: First, they should demonstrate knowledge of St. Louis' neighborhood dynamics and how search behaviors differ across areas like Clayton, The Hill, Central West End, and St. Charles County. Second, ask for case studies specific to your industry within St. Louis - an agency with experience in our market's key sectors (healthcare, financial services, manufacturing, logistics) will have relevant success stories. Third, they should understand local search competitors beyond just the obvious players. Fourth, evaluate their knowledge of St. Louis' business organizations and networking groups (RCGA, St. Louis Chamber, Cortex Innovation Community) which can impact local SEO. Finally, they should be able to explain how they'd approach St. Louis-specific events (Cardinals season, Fair St. Louis, Taste of St. Louis) for seasonal SEO opportunities. A genuine St. Louis SEO agency will speak confidently about these local factors without research.