HTML Checking for Large Sites
Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as lt.
The < and > characters are reserved for HTML tags, so if you need to use them as content, they should be escaped as < and > respectively.
For example, to illustrate the mathematical truth that 1 < 2 in HTML, we can write it this way:
<p>1 < 2</p>
When was the last time you validated your whole site?
Keep your sites healthy checking for A11Y/HTML issues on an automated schedule.