1: Download the file
2: Drag the file on your desktop
3: Right click on the file and then select "Extract Here"
4: Right click on the file that opened when you clicked Extract here, then copy it
5: Open your windows search bar and type in %appdata%
6: Click on roaming
7: Click on your .minecraft file
8: Click on the saves file, if you don't have one, then create a folder and name it "saves"
9: Right click on an empty space in the folder, then click paste
10: Enjoy!