The Linux Foundation's Core Infrastructure Initiative (Core Infrastructure Initiative or CII) Best Practice Badge is a way for free projects and open source software (Free/Libre and Open Source Software - abbreviated FLOSS) to certify that they follow best security practices.
The CII Best Practice Badge is inspired by other badges available for projects that are developing on GitHub.
Users of software with this badge can quickly assess which FLOSS projects follow best practices and, as a result, are more likely to create higher quality secure software.
Projects with a CII badge show the commitment of the software security project. The distinctive sign serves users to be able to quickly assess which open source projects are being looked after for the security of the software.
The awarding of the badge for best practice to The Backdrop CMS shows that the project follows the good security practices formulated by the Linux Foundation.