Welcome to a live Wunderbar demonstration!
Imagine this is a sample page in your website. Imagine you installed the Wunderbar Plugin. Notice the colorful cursor at the upper left of this content. Click it, and you can begin editing this part of the page.
While editing, you'll see a full set of editing tools along the top of the page. Try out a few. You can control the fonts, the colors, the sizes. You can make hyperlinks and tables. It only takes a few moments to realize that this is how WordPress content should be edited. (Plus you also have access to the HTML source code and you can also continue using the old WordPress editor if you need it.)
After you're done editing, when you click the SAVE button at the far left of the Wunderbar, your content is written back to the WordPress database, instantly available to everyone.
(Well, except in this demo. It won't save your work.)