Documentation:
Accessibility Attributes

Here you can enable the aria-required="true" attribute on selected elements. This attribute can be used to help assistive technologies identify which form elements are mandatory.

A) Enable

Here you can enable the aria-required="true" attribute on the selected elements.

B) Add To

Here you can enter a comma-separated list of selectors for website elements that you wish to add the aria-required="true" attribute to.

C) Remove From

Here you can enter a comma-separated list of selectors for website elements that you wish to remove the aria-required="true" attribute from.

For detailed information on the aria-required="true" attribute and its uses, W3C Web Accessibility Initiative (WAI) documentation.