The document discusses continuous deployment, which is the practice of automatically deploying code changes to production after passing automated tests. It explains that continuous deployment allows teams to ship features faster, validate assumptions more quickly, and minimize risks of each deployment. It outlines three criteria for successful continuous deployment: infrastructure like continuous integration servers and monitoring; a collaborative culture that removes barriers to code reviews; and continuous testing from unit to UI levels with production monitoring and rollbacks. The presentation takes questions on continuous deployment practices.