This is known as the notability test. Here’s the official test (abbreviated):
If a topic has received significant coverage in reliable sources that are independent of the subject, it is presumed to be suitable for a stand-alone article or list.
- “Significant coverage” addresses the topic directly and in detail, so that no original research is needed to extract the content. Significant coverage is more than a trivial mention but it need not be the main topic of the source material.
- “Reliable” means sources need editorial integrity to allow verifiable evaluation of notability, per the reliable source guideline. Sources may encompass published works in all forms and media, and in any language.
- “Sources” should be secondary sources, as those provide the most objective evidence of notability. There is no fixed number of sources required since sources vary in quality and depth of coverage, but multiple sources are generally expected.
- “Independent of the subject” excludes works produced by the article’s subject or someone affiliated with it. For example, advertising, press releases, autobiographies, and the subject’s website are not considered independent.
