As the name suggests, users can do whatever they please with your code. There are no conditions or limitations, meaning that it is open for commercial use, modification, distribution, and even private use. It is the most permissive license available.
|✔️ Commercial use|
✔️ Private use
Full License Text
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE Version 2, December 2004 Copyright (C) 2004 Sam Hocevar <email@example.com> Everyone is permitted to copy and distribute verbatim or modified copies of this license document, and changing it is allowed as long as the name is changed. DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. You just DO WHAT THE FUCK YOU WANT TO.