Plugins and themes are the backbone of WordPress, but many people, including developers and general users, get confused about what each is supposed to do. Most of the time, this isn’t an issue, but when it does become an issue, it can cause confusion, “loss” of data and a headache for users. This talk will go over what a theme should be, what a plugin should be, why they are that way, what users should look for in a plugin or theme and finally we’ll quickly discuss child themes and custom functionality plugins.