Before you start creating products you should create this elements that will be needed.
By default, WordPress does not display empty categories in the category widget, but there are times when, especially as a developer, you need to display categories, even if they are “still” empty. And thats what we are learning to do today.
What is the best for SEO, categories, or tags? What is the difference between categories and tags? What is the optimal number of categories in WordPress? How many are too many? Is it okay to assign one entry to several categories? Is there a limit to the number of tags we can assign to each entry? Do the tags work as meta keywords? Is there an SEO advantage to using categories or tags?