This is the 3rd video in the NerdDice create a RubyGem series. In this video, Mike configures RuboCop for the NerdDice project (see the Codecast: Rubocop install and initial setup video for more) and adapts it to his project from his home folder, configuring the .rubocop.yml file and fixes some of the offenses. After that he fleshes out the README file for the project a bit.