impact: is a web-based reference center that is dedicated primarily to the understanding of African-American history and Afro-Caribbean history and the history of people of Sub-Saharan African ancestry. In 2011 the American Library Association's Reference and User Services Association included it in its list of the 25 Best Free Reference Websites of the Year. According to, the website has a global audience of about two million visitors per year from over 100 nations. In 2009, Canada, Australia, Great Britain, Brazil, and Germany ranked as the top five countries in visitors to the site after the United States. A 2008 website review described it as easily navigable and well organized but also as containing omissions among some features and as a work in progress. By 2009, the organization was selected by New York Public Library reference librarians as one of the top 25 hybrid print and electronic resources for the year. More information...

According to PR-model, is ranked 3,799th in multilingual Wikipedia, in particular this website is ranked 2,747th in English Wikipedia.

The website is placed before and after in the BestRef global ranking of the most important sources of Wikipedia.

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