Use opening and closing tags according to specification
Make sure HTML tags are properly opened and closed
Browsers and other user agents, including assistive technologies, can accurately interpret and parse HTML content as long as opening and closing tags are used according to the HTML specification. The goal is to avoid incorrect formatting errors that will potentially cause assistive technologies and other user agents to inaccurately interpret the markup and lead to misleading or false information due to markup not being used as expected.
To do this, simply ensure that user agents, including assistive technologies, can accurately interpret and parse content. [...]