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 facts about the page's subject. Infoboxes may also include images or maps.

Wikipedia's infoboxes almost always use the template software feature. 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.