Display Category description in WordPress

If you want to add a category description to the category page, you need to open a file that displays categories in your theme, usually this is a file archive.php or category.php and add this code to it

<?php
echo category_description(get_the_category()[0]->cat_ID);
?>

Also you can use function in file functions.php

function cat_description(){
	if ( is_category() ){ 
		echo category_description(get_the_category()[0]->cat_ID);
	}
}

To display category description on any page write

echo cat_description();