Wikipedia is a free online encyclopedia that allows anyone to edit its millions of articles, but this open editing policy can lead to inaccuracies from vandalism, bias, or lack of expertise. While Wikipedia is a useful resource for students, some educational institutions have banned its use as a primary source due to reliability issues. Solutions include banning Wikipedia use, implementing stricter editing policies that require certification or qualifications to edit articles, or making Wikipedia a paid service to cover costs of professional writers.