Note that companies rarely post their complete strategies on their websites for the world to see. Why not? Because if companies let everyone know their entire strategy -- where they are going, what their plans are, where they might be expanding, what new products they will launching, etc. -- they will lose their competitive advantage. Losing a completive advantage can cost a company money.
Therefore, it is very difficult to find information about a company's strategy. However, you can sometimes glean small tidbits of a company's strategy by reading company news, 10-K reports, earnings conference calls, and investment publications. This page shows you where to find that information.
Public companies in the United States have to submit filings to the the Security and Exchange Commission. The 10-K filings, filed by public companies at the end of their fiscal years, contain a good deal of information.