What is pillow fort?

You find the information on their homepage under "what is pillowfort"?

> Pillowfort.social is a multipurpose blogging platform. You can use Pillowfort to connect with other fans of your favorite books or tv shows, show off artwork or writing, get tips and advice on your hobbies, and much more. We're independently funded by our users and we strive to protect user privacy, give our users maximum control over the reach of their content, and protect our users from bigotry & harassment.