Labels is a great feature that allows to easily organize tests and then include them in your CI/CD process.
You can add multiple labels to each test flow by clicking on Labels or select a few test flows and click the labels icon.
// Note, you can provide multiple labels separated by commas.
loadmill <test-suite-id> --test-suite -t <token> --labels "label1,label2"
Thus, by using labels, you will make sure that only relevant test flows run per a code-change, deploy etc.