These library databases are great resources for doing research about your company, particularly if your company is large, has been around a long time, and is successful. These databases can provide you with business-related reports about your company but might not be the best source for all companies. Some things to keep in mind while searching these databases:
Information about your company, your product, and the competition is a great place to get started in your research. In addition to the links below, there are other places you can get valuable information about the history and background of your company:
If your company is publicly traded on the stock exchange then advertising expenses will be reported on a company's financial or income statement. On Yahoo Finance you can find this information by searching for your company, then selecting the Financials tab and looking under "Selling & Marketing Expense"