GMO Go to Top is simple plugin and it will add a simple button which allows users to easily scroll back to the top of the page.
This plugin let you place a link button to go back to top of the page from the bottom of the screen. You can place a button either bottom left or right of the screen.
Even if you are at the bottom of the long single page, this button will take you all the way back to the top with a single click.
You can also change button color, size, position and styles or you can even use your own button to perfectly suit your website design.