These are patches designed to improve system responsiveness and interactivity with specific emphasis on the desktop, but configurable for any workload.
What you have to do? nothing, you will get it for free and you should expect a more responsive desktop. I personally notice some improvements when the CPU is under heavy load, the desktop does not freeze and the apps keep working normally.
NOTE: Are you on a SDD? then you can try to enable also BFQ scheduler as explained here: How to enable the BFQ I/O scheduler on kernel >=4.12