All I know is that Zillow estimates can be way off.
For example, I have a rental that Zillow values at about 525K. The house next door, same size, same vintage, but in better condition is listed for under 400K and has been on and off the market for over 6 months. In that case, Zillow overstates the value by at least 30%.
The funny thing is that up until January or so, it had my property value somewhere right around 400K. Then, they implemented a “new more accurate method” that completely gets my place wrong.