When to include Previous and Next button or link?

1. When should you use a link versus a button?
2. What are next and previous buttons called?

When should you use a link versus a button?

There are differences as to when a button should be used rather than a link. UX Movement wrote an article about this, and they came up with a simple rule: Buttons are used for actions that affect the website's front-end or back-end; links are used for navigation and actions that don't affect the website at all.

What are next and previous buttons called?

Previous and next buttons are navigation buttons on a website, an app.