Split the account at the state line before you split it anywhere else
Geography is the first cut in a Kentuckiana account, ahead of matter type, device or match type.
Draw Kentucky and Indiana as separate campaigns with separate budgets, even if you practice in both. They have different competitors, different costs and different landing pages, and mixing them means one side funds the other.
Inside Kentucky, keep Jefferson County separate from Oldham County and Bullitt County. Metro searchers behave differently from people driving in from further out, and a single Louisville campaign averages the two into a number you cannot act on.
Set targeting to people present in the area rather than people showing interest in it. Otherwise you will pay for clicks from someone in another state researching a Louisville case they are not going to hire you for.
If you are licensed in Kentucky only, exclude Clark County and Floyd County outright. Excluded clicks feel like lost opportunity for about a month, until you notice how much intake time comes back.