Will bad things happen if I delete my cache folder?

I’m having this weird error in a server and somebody said to delete the cache folder. I’m a bit suspicious about that but I have no clue what the cache even does.

What happens if I delete it?

[editline]05:07PM[/editline]

Will it come back upon starting gmod?

Yes, it will come back.

Yes. It contains all the downloaded lua files and anything else that was downloaded but not finished. The lua should redownload, and the second part doesn’t even matter.