An action is a single delivery step Serpent performs against a Salesforce org, such as validating metadata, running tests, deploying changes, or seeding data. Actions are the building blocks of the automated pipeline that carries work from a sandbox to production.
Where actions fit
As a Work Item moves through review and into a release, Serpent runs the appropriate actions automatically. Continuous integration validates and tests changes; deployment actions push them to the next environment.
No runner to maintain
Because Serpent runs pipelines natively, there is no separate CI runner like Jenkins or GitHub Actions to configure. The steps that would normally live in a YAML file are managed visually instead.