The next screen you encounter will be the Microsoft Software License Agreement page, which is essentially a giant text box containing the license terms for the edition of Windows 8 you're installing.
Read through the agreement, check the I accept the license terms box, and click or touch Next.
Important: You should always read software license agreements and look for caveats you might not have expected, especially when it comes to operating systems like Windows 8. Microsoft, as well as most other software makers, have strict and legally binding limits as to how many concurrent computers their software can be operated on. For example, a copy of Windows 8 can only be installed on a single computer at a time. In reality, this means one product key per computer... period.
Note: It's completely legal to reinstall Windows 8 via this clean install method. So long as the product key you use to install Windows 8 is only used on one computer at a time, you're not breaking any rules.