Who are your customers? For basic demographics (people, income, etc.), start with these U.S. Census Bureau websites and the Statista database:
Occupational Outlook Handbook offers information about career and industry trends and income.
If you're researching a company's organizational strategy and need information about the company, use these research guides:
The database ReferenceUSA is useful for searching for area businesses by county or zip code, to develop a list of competitors or a mailing list, for instance. It is available through many public libraries, such as those in our Southern Adirondack Library System. Search it online by logging in with your library card number.