Continuous integration enables developers to have an automated way of validating the quality of their check-ins. A CI server will monitor your version control repository and on every check-in will build the project and at the very least run unit tests. If anything goes wrong (compilation error, failing test, etc.), the server will send e-mail to the team so the developer responsible for the faulty check-in can investigate and fix the problem.
I vaguely understand why this weird key combination from the 20th century offers some security advantage that somehow justifies that it’s still present on enterprise versions of Windows, but why does it have to be so hard and inaccessible?