If you are unsure how to edit/create articles and have no idea what all those crazy symbols mean, then you should perhaps read over our howto section.
If you have any other questions not answered in that documentation, please create a new forum topic with a description of what you are trying to accomplish.
More about the Wiki
The wiki is meant to help users discover meanings to the massive amount of tags that exist on the site. If you want to invent a new tag, it is recommended that you create a wiki with more information describing what this tag means. If you just happened to find there was no wiki article, then create one for us.
Edit Wiki
Make sure you understand what you are doing before you hit edit. Any poisoning done accidentally or otherwise will result in a permanent ban.