I see that taxonomies have a default description field with comment:
The description is not prominent by default; however, some themes may show it.
I have added my own detailed description WYSIWYG field but I was wondering what best practices are for using the default description field? I feel that I should put something in that field since it is available.
I have rarely found a theme that uses this field.
I have never used it.
There is a function for getting it https://developer.wordpress.org/reference/functions/term_description/