What does selecting RunAllTestsInOrg allow you to do?

Selecting the option to RunAllTestsInOrg allows you to execute all tests within the organization, which includes not only your custom tests but also tests that are part of managed packages. This capability is particularly important during the deployment process in Salesforce environments, as it ensures that all components, including third-party managed packages, are evaluated for their performance and correctness. Running all tests provides a comprehensive overview of the system's health and ensures that changes do not negatively impact the existing functionality across the board. This is essential for maintaining the integrity of applications, especially in complex Salesforce environments with various integrations and dependencies.

While there are options for committed tests, running in production environments, or limiting tests to local environments, they do not encompass the full spectrum of functionality provided by the RunAllTestsInOrg option, which is specifically designed to cover all tests across the organization.