Text in a <desc> element is not rendered as part of the graphic. If the element can be described by visible text, it is possible to reference that text with the aria-describedby attribute. If aria-describedby is used, it will take precedence over <desc>.
The hidden text of a <desc> element can also be concatenated with the visible text of other elements using multiple IDs in an aria-describedby value. In that case, the <desc> element must provide an ID for reference.
Example
<svgviewBox="0 0 10 10"xmlns="http://www.w3.org/2000/svg"><circlecx="5"cy="5"r="4"><desc>
I'm a circle and that description is here to demonstrate how I can be
described, but is it really necessary to describe a simple circle like me?
</desc></circle></svg>