The levels are assigned according to how much information is voluntarily provided to GuideStar by the nonprofit about their organization.
GuideStar gathers initial data from the IRS, which collects that data from all organizations throughout the country via tax forms. Nonprofits can then provide additional information to GuideStar to raise their profile level.
For instance, Bronze level requires basic information such as the mission statement, description of programs, and geographic region served.
Platinum requires the addition of further data and explanation of finances, goals and strategies, and progress and results (as determined by the nonprofit).