Where do I input 'categories' for Blog page

Where exactly do I input categories for a blog?

On the Rapidweaver default blog page, go to Inspector > Page/Plugin Settings (gear icon) > Categories where you can manage your categories and their visibility. To assign a category to a post, there is a field labelled Categories in the Edit mode.

Note that you cannot manage tags (delete or add them) from the Page tab. You have control over them only through individual posts.