What are the outputs of monitoring and controlling usually?

Performance reports, Change requests, Recommended steps for process improvements, updates to project planning documents..

Optimal usage of the resources and proper time management.

The overall status of the project which is related to its scope, schedule, costs, qualities, risks, resources, and performance.

The strong monitoring and controlling system is help you to complete your tasks in-time, increase the quality of work and  reduce reworking, 

Reports of approbation or rejection of the works.

the result of good monitoring and controlling is that your project remain in the track.