From BGO Wiki
You are welcome to edit any article on BGO Wiki that has a edit tab. Click the "Edit" tab and type your entry. Review your saved page with the "Show Preview" button. Once complete, hit the "Save Page" button, (located next to the "Show Preview" button) at the bottom of the page. You can click the edit button again to correct a typo or to continue to add more content. You can add a comment in the Summary box, (located at the bottom of the page) to give a brief explanation of your edit. This will help the Administrators when patrolling edits.
Undo an Edit
You can undo an edit by going to the "History" tab at the top of your page. You can click the link that shows the date and time and then correct any previous edit there. Once you are satisfied, you can click the "Save Page" button at the bottom of the edit page. You can add a comment in the "Talk" section if you wish to have an Admin undo a certain edit. The admin can undo or "rollback" a page if needed.
You can link an existing page to your article by placing double square brackets around the page title:
If no such page exits, you will see the new link as a red link. You can create the new article by clicking on the "Create" tab.
You can refer to the for more details on editing.