Secret scanning's push protection feature prevents supported secrets from being pushed into repositories, and has to date been enabled at the repository, organization, or enterprise level.
Now, everyone across GitHub can enable push protection for themselves within your individual settings. This ensures your pushes are protected whenever you push to a public repository on GitHub, without relying on that repository to have push protection enabled.
To opt in, go to the "Code security and analysis" section of your personal settings. Next to "Push protection for yourself", click Enable.
GitHub will enable push protection for all GitHub Free individuals by default in January, 2024.