The document provides instructions for integrating BambooHR with PayScale by going to the Employee Refresh Page in PayScale, selecting BambooHR, and inputting the organization's BambooHR domain and API key. To get the API key, users need to sign into their BambooHR account, go to the API keys section, add a new key specifically for use with PayScale, and copy the long digit string to paste into PayScale to complete the integration.