Every figure and table should have a caption. Here are some tips on using captions: A figure caption is centered under the figure; a table caption is centered above the table (if a caption is more than one line, make it left justified).

Where would you find a caption in a text?

This page in a nutshell: Image captions should be succinct and informative. A caption is text that appears below an image. Most captions draw attention to something in the image that is not obvious, such as its relevance to the text. A caption may be a few words or several sentences.

What are captions in a table?

A caption functions like a heading for a table. Most screen readers announce the content of captions. Captions help users to find a table and understand what it's about and decide if they want to read it. If the user uses “Tables Mode”, captions are the primary mechanism to identify tables.