Conduct is adopting core virtues and living your life in accordance with them.  The three steps in this division are Skillful Speech, Skillful Action, and Skillful Livelihood.

Living a Skillful Life
Three steps of the Eightfold Path address living a skillful life: Right Speech, Right Action and Right Livelihood. While the content of these steps may seem to consist of “do’s and don’ts”, the three virtues are mindful practices from which we can gain insights.
Robert Hodge

The Eightfold Path: The Conduct Steps
Skillful Speech, Skillful Action and Skillful Livelihood are the three steps in the Virtue or Conduct division of the Eightfold Path. This is from a Series on Eight Mindful Steps to Happiness by Bhante Gunaratana
Robert Hodge