Snyk is a tool that helps spot project vulnerabilities, including hardcoded secrets, by analyzing dependencies and comparing them against its vulnerability database, generating comprehensive reports. To use Snyk, one needs to create a free account, allow access to email address linked to the account, and configure access settings to enable regular scans and generate Fix Pull Requests. The Snyk goof project is used as a reference Node.js boilerplate application with hardcoded secrets that can be fixed using Doppler, an open-source secret management tool. By adding secrets to Doppler, one can centralize their secrets, manage different environments, and prevent accidental exposure on GitHub. The Doppler CLI provides access to secrets in every environment, making it easy to inject them into applications. Snyk and Doppler work better together, streamlining the development process with more security and efficiency.