Welcome to the wonderful world of wiki, the benefit is that you can edit the page (and fix my spelling mistakes).
Here is a brutal quickstart because I am sick of clicking on the links below:
== Heading == You can type things pretty much as you would expect and the paragraph will flow from line to line. Leaving a blank line will start a new paragraph. When typing you can ''emphasize text'', to '''make a point''', but that stops being '''''fun''''' after a while. === Sub Heading === One of the fun parts of a wiki is linking: * [[Page]] link ** Same thing as [[Page]]s and [[page]] * [[Page#Sub Heading]] same as [[Page#Sub Heading 1= ** You could also link to [[Page#Sub Heading 2]] * [[Page|a sample page]] also works To link to the wider wilder web: * http://udig.refractions.net * [http://udig.refractions.net uDig] * [http://udig.refractions.net] <!-- shows up as  --> Remember: :You can create a link to a page that does not exist yet Where: ; page link : can be clicked to jump to a page ; external link : will take you to another web page === Sub Heading === Hacking with html is mostly allowed - here is a code example: <code>x = x 1;</code> although you probably want to break out a pre tag for examples of more then one line.
More information about Editing wiki can be found here : MediaWiki Edting Help