<marquee> elements are deprecated and must not be used
Content that moves or auto-updates can be a barrier to anyone who has trouble reading stationary text quickly, as well as anyone who has trouble tracking moving objects. It can also cause problems for screen readers.
1✗ <marquee> <!-- Marquee Text --> </marquee>
How Users Are Affected
Moving content can be a severe distraction for people with attention deficit disorders, making it difficult for them to concentrate on other parts of the web page.
WCAG Success criteria
This issue might cause elements to fail one or more of the following Success criteria:
2.2.2 Pause, Stop, Hide (A)