If you're looking for a marketplace marketing agency to help you grow your sales, there are a few key factors to consider. First, you'll want to ensure the agency has significant expertise and experience in the field. Additionally, the agency should have a variety of strategies and approaches that they can use to tailor their approach to your specific project. Finally, it's important to find an agency that communicates clearly and frequently, so you can stay up-to-date on their progress and any changes to your marketing plan.