Ideally, testimonials should tell you about those issues, and the case that you can think of is case studies. When they come to solve various issues, they give you a good picture of a specific agency depth and width.
If you feel that a mobile advertising platform has received many awards, you can decide that it will provide you the best online marketing services. It is also possible that the media will ask such agency. A website provides a lot of information about an agency, an online marketing agency that has a website that is properly designed and informative displays, which is to attract customers. You can find that reputable marketing agencies usually attach social features to your website and have a good example blog.