How does jenkins reject?

Question

git

observed the work of one person.
he made a commit and a pull request, and after some time something like build jenkins failure was written in jira.
how it works? I don't know this system. what does it try to do with new commits? what will happen in case of success or failure?

Answer 1

jenkins, for example, monitors a certain branch, after commits it builds the code from that branch. further business for small