While the California Consumer Privacy Act is in many respects a “game changer,” it is far from the first “game changer” in the area of data privacy. This guide provides a straight-forward summary of what the Act requires, and, for those companies with developed privacy programs that are already compliant with other United States and European laws, an explanation of the “delta” – i.e., how this law differs from what you already know. My hope is that it is a useful resource both for companies that are new to privacy and for companies that have spent years navigating the twists and turns of this exciting area of law.