Do not use tables on your website unless necessary. When you must use a table to organize data, be sure to indicate the heading row, as this will help assistive technologies, such as screen readers, read the information in a meaningful way—not just as a string of numbers or words.
If at all possible, do not add PDF’s to your website. For example, if you have a PDF of your menu on your site, create a page for the menu and type it out instead. If adding PDF’s to your website is necessary, make sure that your PDF is accessible through Adobe.