The policies on content and style define the standards encyclopedic content must meet in order to be included in Wikipedia. Notability, which is a corollary of these standards, governs the structuring of Wikipedia into stand-alone articles, lists of topics, and mentions in ancillary articles.
The basic currency of articles in Wikipedia is reliable sources that establish verifiability. If a source is considered verifiable and reputable, it can be included in Wikipedia in the proper context. But not all sources carry sufficient weight to serve as the basis for a stand-alone article. The Wikipedia community has defined notability as the criterion which establishes when a topic has reached enough substance to support an article.