Roon Core and Sonos

My stereo paired Sonos Play 5’s plus Sonos Sub have been working wonderfully in general with Roon for 15 -18 months. In past years I have felt relatively on top of technical stuff but I find myself a bit unsure when it comes to Roon Core. I am not sure what it really is or really does and I am somewhat hesitant to launch/install something I don’t understand.