This question might seem vague but I know how to work with TWIG. At the moment, I am trying to extend the Category pages and specifically Category description section in Shopware 6 storefront. But I can not find the Category Description block.
I was able to trace a block to the Category at storefront/page/content/index.html.twig
{% block cms_content %}
<div class="cms-page">
{% block page_content_blocks %}
{% sw_include "@Storefront/storefront/page/content/detail.html.twig" with {'cmsPage': page.cmsPage} %}
{% endblock %}
</div>
{% endblock %}

You may want to check the type of the CMS page.