Wikipedia:Content policies and guidelines in a nutshell
 | This is an essay. It contains the advice or opinions of one or more Wikipedia contributors. This page is not an encyclopedia article, nor is it one of Wikipedia's policies or guidelines, as it has not been thoroughly vetted by the community. Some essays represent widespread norms; others only represent minority viewpoints. |
Articles appropriate for an encyclopedia, cite verifiable claims from reliable sources (in proportion), without inserting our own claims.
Claims should come from published sources that can be verified by other Wikipedia editors.
Verifiable claims should be based on references with editorial oversight, released by publishers that have a reputation for fact-checking and accuracy.
Citing verifiable reliable sources is necessary for editors to verify the claims and assess the reliability of the references.
Wikipedia articles should present the claims and opinions appearing in the published body of reliable sources, in proportion to their prominence.
Claims must be verifiable in reliable references, since editors may not insert their opinion, analysis or interpretation of a subject into Wikipedia articles.
Wikipedia articles require enough reliable independent sources to build an encyclopedic article and satisfy the requirements of policy. Also, there are subjects that possess enough sources to build an article, but articles that represent what Wikipedia is not are still inappropriate.