Pages are the essential part of a Next.js Template. You can add or modify pages as per your requirements. You can find all of the template pages inside /pages
folder.
Since Next.js supports File-based Routing, you can add subfolders and create pages inside it and it would work without any extra configuration.
Eg: You can access website.com/company/careers
if you created a careers page inside company folder like: /company/careers.js
Dynamic pages are named with square brackets. eg: [slug].js
which is mandatory for next.js to work.