There Are Two Sources of Data
Primary Data: Generated and driven by you and your business, data mined from your employees, customer surveys, studies, focus groups, consultants, can be costly depending on your methods (data specific to your business).
Example: Businesses that track their customer's residential zip codes or telephone numbers will know where their customers live. There are ways to employ technology to gather and collect customer data.
Secondary Data: Sources of data found outside of your business, usually available by either online web sites, commercial databases, or in printed materials. Sources include: census bureau data, news and media sources, surveys conducted by trade associations, labor market statistics, government-generated reports and economic indicators, city guides, chambers of commerce, U.S. Department of Commerce, trade publications, commerical databases, neighborhood associations, downtown authorities, trade shows. Most secondary data is quantitative.