This document presents an introduction to setting up Drupal websites using a multisite configuration. It discusses what multisite is, the benefits of using it like code management and cost effectiveness. It also provides an overview of how to set up multisite by installing Drupal, configuring the database and virtual hosts, and optionally adding site-specific modules. Pros are listed as shared code base and content across sites while cons note potential issues with content sharing and increased server load. Resources for learning more about Drupal multisite are also provided.