What are the rubber feet / stands for ? [pic included]

[ramishehadeh13]

Hey guys, new to this site and PC Building.
What are the rubber stands that are found near the power supply mount for? And are they important ? because I didn't use them since they kept slipping out of place.
Took a screenshot from a video that reviews the same case since it has better lighting.
The case is Coolermaster Masterbox lite 5
Image

 

[Gam3r01]

Most likely noise/vibration dampening, similar to the rubber mounts some HDD cages use.
You are probably fine if you dont want to use them, most cases dont have those.