By default, the category description is Not displayed. But if you need to display it, it will require a small code change. Here are all of the necessary steps:
1.Login to your Admin Panel
2. Navigate to Left Menu -> Appearance -> Theme Editor
3. Open ‘archive.php’ file for Edit
4. Below
<div id="main-content-wrapper">
insert the following code:
<?php
the_archive_description( '<div class="taxonomy-description">', '</div>' );
?>
5. Save changes
6. (optional step) You can apply some style to the category description by navigating to Admin Panel -> Left Menu -> Appearance -> Customize -> Open ‘Additional CSS’ section, then insert the following code:
.taxonomy-description {
text-align: center;
font-size: 22px;
margin-top: 10px;
}