Searching the web for a good search engine marketing company can be quite challenging because of the sheer number of companies competing to get your attention. Before settling with one company, always check references to see if the company has good background when it comes to their core and customer service. It is also necessary to stick with a search engine marketing company that has many years of relevant experience in the business. On top of that, ask the company if they release paper work, receipts and other relevant proof of transaction so that if there are any issues, you can use these as proof for the company to address accordingly.