Wikipedia articles can take many forms with differing content displays. The basic types include:
Outline pages: article links in an outline format. They show how important subtopics relate to each other, and can be useful as a more condensed, non-prose alternative to overview articles. Example: Human Sexuality
Timelines: list events chronologically, sometimes including links to articles with more detail. Example: Timeline of Counter-culture
Lists: mention items of a particular type one by one, including basic information and links to external articles. Example: History of LGBTQ in policing
Also inlcuded in Wikipedia are glossaries, books, spoken articles, third party classifications, and much more!
Every article generally includes:
For more help, see Wikipedia:
Needs Context and Linkages
Needs Verified Sources
Expand and Add with Multiple Issues
Missing Biographical Information