Question

What are used to perform some action on the given webpage.(Button

Answer 1

A Call-To-Action Button? Call-to-action (CTA) buttons..using perform some action on the web page..

Answer 2

Buttons are used to execute the actions on the webpage.

When you click a button on the webpage, it will take you to the specific link or redirect you to the other pages based on the setup done at the backed of the website.  

Without a button, you cannot browse the web pages easily so every web developer will relay highly in implementing the button setup on their website.