What's the Friendliest 'Back' Button?

1. What is the go back button?
2. Where should back button be placed?
3. Where should back button be on app?

What is the go back button?

In a Web browser, a back button allows an end user to navigate to a previously viewed Web page. A back button also is a feature of smartphone software and other consumer oriented technologies.

Where should back button be placed?

Place a persistent Back to Top button in the lower right side of the page. This is where people expect to see it. This position is out of the way, but noticeable. When the button is placed in a different place on the screen, it is often ignored.

Where should back button be on app?

Since the top left is pretty standard for most apps, this makes it recognizable for the user and therefore easier to find and use. This position is only difficult to reach for mobile devices. That is why the bottom left would also be possible, but the most important option like a next button is at the bottom.