Acetone is a volatile liquid solvent, with many uses. It's a somewhat dangerous thing, and you should learn about safety considerations for acetone before using it.
Here is an MSDS: (Material Safety Data Sheet) for acetone: https://www.msdsdigital.com/system/files/Acetone.pdf
Read the MSDS and consult with someone who is comfortable with telling you about acetone before using acetone.
Acetone should be stored in the flamables cabinet in the Small Metals area.