What do the DORA “four keys” metrics measure?

Why this is the answer

The four keys measure a team’s software delivery performance: the speed and stability of getting changes to users. They are not a static code-quality score, which counts style and bug findings. They deliberately avoid per-developer output like lines or commits, which DORA warns against as a productivity proxy. And they do not measure infrastructure cost or utilisation, which is a separate financial concern.