When we worked on our hackathon project jetztein.de, we wanted an easy way to immediately see the current state of our application. Ideally a new version should get deployed every time we push changes to the repository. This is commonly referred to as Continuous Deployment (CD). The GitLab blog has a nice introduction to the topic (and also how their tooling can help you implement CI/CD). They write:

Continuous Deployment is a software development practice in which every code change goes through the entire pipeline and is put into production automatically, resulting in many production deployments every day. …