Typically, you shouldn't go smaller than 20 or 30 miles around, since
if your radius is too small, it's likely you'll miss traffic from
people that are actually in your target area. You might also consider
how local your business is (will people be willing to travel X
distance?) and think about the trade-off between expanding the area to
capture more false positives or shrinking the area and risk not
reaching people that you actually want to because of their IP. If
you're in a rural area, you might want to consider including the
nearest metropolis if you know that IPs in your area are identified as
a particular city or region.

Hopefully other custom-area users will give us their thoughts too!

~AdWordsPro.Steph

On Sep 9, 1:30 pm, Mpls-baseball wrote: