Wikipedia:Manual of Style/Infoboxes
An infobox is a panel, usually in the top right of an article, next to the lead section (in the desktop version of Wikipedia), or at the end of the lead section of an article (in the mobile version), that summarizes key features of the page's subject. Infoboxes may also include an image, a map, or both.
This guideline is a part of the English Wikipedia's Manual of Style.
|Manual of Style (MoS)|
Wikipedia's infoboxes almost always use the template software feature. (It is possible to hand-code an infobox using table markup, but this method does not have the template's advantages of standardisation and reusability.) The templates have parameters; to work properly, the parameter values have to be specified when the template is inserted in the page. This allows each infobox to show information relevant to the article subject, while requiring only a minimal amount of coding within each article.