Providing alternative text (alt text) for non-text elements should be done in all applications.
See below for instructions on how to set alt text for non-text elements in Word 365 below
(Clicking on the image will open a large version in a new window.)
(Clicking on the image will open a large version in a new window.)
(Clicking on the image will open a large version in a new window.)
If you have elements on your page which are purely decorative and do not have any relevance to the documents meaning you can check Mark as Decorative in the Alt Text box and a screen reader will ignore them.