This chapter was all about expanding the features available on your site and making your content more attractive without the need to touch any source code. Basically, that's the whole idea behind plugins. Let's face it, most developers actually don't need plugins because they can code things on their own. However, for the rest of the world, plugins are what makes WordPress easy to use and attractive for everyone.
At this point we know how to control the content of our WordPress site, so now it's about time to learn how to control the display. In the next chapter, we will start discussing themes.