Like most of eCommerce, you might have a lot of products on your website and this is the main reason why you need anchor filters that will allow your customers to review only products they are interested in.
Number of products per page
We recommend from 15 to 24 products per page because less than 15 will force your customers to click all the time on next page and over 24 products might slow down your page speed.
Unlike 2014, more and more e Commerce doesnt include content in category page, even through it might affect the navigation. In their latest report, SEO Lotus show how SEO can't be avoided today. You can check one great example on Petra beer glasses category page.