Are these pages or categories?

I really like the flow of this website – https://madefromscratch.co.nz/

For example, if you click on “eat” it takes you to a section that has “breakfast”, “drinks”, “mains” etc. Then, if you click one of those, it takes you to a page that has pictures of all the main meals for example, which then leads you to the posts.

How can I set my website up so it has the same flow?

Thanks ??