Are the keywords in SEO recommendations ranked according to importance / impact?

Yes, in the recommendations the keywords are ranked according to importance. This means that keywords that are displayed first have a higher search volume or are better suited to your shop. So try to place the keywords that are listed first even more strongly in your content or on your pages.

However, when you convert them and get to the keywords page, they are listed alphabetically. It's best to simply sort them by search volume!