The class attribute assigns one or more classnames to the <li> tag.
Classnames are defined in a stylesheet or in a local <style> element.
Classes, i.e. classnames, are used to style elements.
A class attribute styling 3 <li> elements.
<style>
.job-title { color:teal; padding:3px 0; margin:5px 0; font-style:italic; }
</style>
<ol>
<li class="job-title ">Designers</li>
<li class="job-title ">Developers</li>
<li class="job-title ">Managers</li>
</ol>
Try it live