The tutorial guides users on how to scan files and directories for sensitive information, such as API keys or credentials, using the GitGuardian API and its Python wrapper. It explains the setup process, including installing the necessary Python client, obtaining an API token, and setting up environment variables. The tutorial details how to write a Python script that uses the GitGuardian API to detect and report policy breaks, such as high-risk file extensions or filenames, and outputs the results in JSON format. Users learn to handle API limitations by processing files in manageable chunks and printing detailed results, including policy break types and matches. The tutorial emphasizes best practices, such as not hardcoding secrets and considering any exposed secrets as compromised.