Should I include a back button on a responsive website? [duplicate]

1. Should I add back button to website?
2. Where should I put the back button on my website?
3. What are the most important must haves for any responsive website?
4. Why do some websites not allow back button?

Should I add back button to website?

You should not do this. Users know about the back button. "The Back button is the lifeline of the Web user and the second-most used navigation feature (after following hypertext links)".

Where should I put the back button on my website?

Left: back button next to the primary button (not recommended). Right: back button above the form (good). Some forms or questionnaires appear across multiple pages and some people want to go back to check or change their answers.

What are the most important must haves for any responsive website?

With the design of responsive Web sites, providing the reader with a comfortable experience is a top priority. Practically speaking, you need to ensure that padding and margins do not disappear on smaller screens. Font sizes and line spacing should adjust to the relative amount of whitespace on screen.

Why do some websites not allow back button?

It's probably because the link/website was opened on a new tab. You won't be able to go back to a previous page since it was opened on a new tab. It is generally a bad idea overriding the default behavior of the web browser. A client-side script does not have the sufficient privilege to do this for security reasons.