So, you know that's a Wiki, right? OK, no probs. I'll explain it to you. According to Wikipedia:
A wiki is a website which allows its users to add, modify, or delete its content via a web browser usually using a simplified markup language or a rich-text editor.
Well, you can have your own brand Wiki page both by paying $ or for free. I'll show you the free way first.

Steps: 

  • Go to this website called Wikidot.
  • Click on Create Account.
  • You have 2 options now: Option 1: Signup using the old, boring way
                                           Option 2: Take a shortcut with Facebook!
  • Let's take a shortcut.
  • Login with your facebook credentials. 
    Click to zoom
  • Now, you will get logged into the website.
  • Come back to the homepage and type in your required web address into the box in middle.
  • Then click "GET IT NOW"
    CLICK TO ZOOM
  • That's it. Next, you have to fill up the basic details such as Site name, tagline, themes, etc.
  • Within a few seconds, your Wiki would be ready!