You may want to find out more about a Foundation you read about through Pivot, a newsletter, or a website. Investigating a funder profile is called "prospect research." You'll want to answer several questions, includign:
Resources for answering these questions:
Pivot. The library database offers profiles of funders and much more in-depth information not available for free to the public!
Foundation Websites. Many times, foundations and corporate grant makers will not have websites.
GuideStar. Non-profit organizations are required to share their 990s with the public, which includes information about the organization. 990s also list organizations the funder has awarded grants to in previous years if any.