Where the boundary starts
You type the address and a boundary comes back already drawn from parcel data over a satellite image of the actual property — the beds, the verges, the strip along the drive, the curb islands, the retention pond bank if it is yours. You adjust the edge where it is wrong. If a property has never come through that pass, or the shape needs drawing by hand instead, that is the fallback, not the only path.
What that buys you at renewal
Once it is confirmed, it is the same shape next year and the year after. Every company prices the same shape. Three proposals that answer the same boundary are three numbers you can put beside each other, which is the whole reason to re-bid a grounds contract instead of renewing it out of habit.
What it does not do
Nothing here reports an acreage for a property nobody has confirmed. The starting shape is a draft until you have looked at it; the boundary that prices your contract is the one you signed off.