First you need to understand why Laravel framework is powerful, and what the framework actually is and means for you as a client. You will understand the difference between Laravel and WordPress, framework and CMS.
Clients often need to purchase hosting package for projects. so you need to understand the basics about hosting differences, deployment process and version control systems like Github or Bitbucket.
Not exactly a Laravel topic, but totally related to project success. As developers, we know how to manage us in effective way and achieve results together. Clients need to be actively involved in process, we'll tell you how.