Wikipedia:Manual of Style/Tables

Tables are a way of presenting information in rows and columns. They can be useful for a variety of content presentations on Wikipedia, but should be used only when appropriate; sometimes the information in a table may be better presented as prose paragraphs or as an embedded list.

Avoid referring to tables as being located on the left or right of a display page. Placement is different for viewers of the mobile versions of Wikipedia, and is meaningless to people having pages read to them by assistive software. Instead, use captions to identify tables.