Question

A new instance of ___________ is created upon every check-in.

Answer 1

of your development pipline

Answer 2

Answer is 'deployment pipeline'.

More details in the topic:

Similar to the concept of 'Continuous Integration' in Software development and testing, 'Deployment pipeline' is an end-end approach in software delivery process.

Deployment pipeline is a technique in which a software is guided through check-in to release level.

At every check-in in the 'commit' stage of the software development cycle, a new instance of the deployment pipeline is created.