Jetpack Complex is a term used to describe a piece of software, a plugin or a theme in WordPress universe, that attempts to do too much and becomes painful to use for the user. An example of Jetpack Complex would be a plugin to display video that also tries to be your spelling and grammar checker program, sharing tool, and even contact form, resulting too much hard drive usage, server memory, and user time for maintenance by updating the part of the software they don’t actually use.