The basic rule is that if you write something on the web, try to do it mainly for customers not for search robots. Look at your content through the eyes of the reader. Be original, have unique content, offer your know-how. And you'll be rewarded even by the search engines. They are quite smart today and know what is and is not copied without work and invention.
Make the category names in the menus comprehensible as well as brief. Limit the number of categories in one level to a maximum of ten. Use product filtering instead of categorizing categories into lower and lower levels.
Main Page Title
The main title site is very important for visitor orientation and, of course, for search engines as well. Name them as keywords that you find your customers are searching for. But with optimization, do not overcome it. Still, what's good for the customer's eye is good for search engines as well.
Automatic or manual SEO?
When does it make sense to fill Manual SEO to set subtitles and META tags? If automatic is not enough for you to have SEO under control. If you do not fill out the manual SEO field, it will fill in the automatic. Filling manual SEO therefore has a higher priority than automatic. Manual SEO is more a matter for experienced optimizers or professional agencies.
(for example at Content / Category - Seo section):
( Settings / Main - SEO section)
At automatic SEO just fill in the algorithm and based on headings, main keywords and add-ons, all SEO subtitles are generated at one go. Of course, you can arbitrarily substitute for specific cases of manual SEO. So it's very fast and easy.