You want to know how the value of a site compares to those around it – it lets you know when you're on to a bargain (or when there's some haggling to be had).
This lives under the Comparables layer, which you can select in the top right.
There are two price mode to choose from:
Sold price
£/sqft
Choose which works best for you, then you’ll be easily able to compare prices for a particular area.