Keep in mind that this type of correlation is baked into the system. Lawyer hires an ad agency to get the word out. Agency does SEO on inbound clicks. Finds tha

Keep in mind that this type of correlation is baked into the system. Lawyer hires an ad agency to get the word out. Agency does SEO on inbound clicks. Finds that there are geographical clusters where a lot of searches originate from. Agency responsibly increases bids on ads for devices in those places. The agency could take the next step and identify what those places are and why they're popular with people looking for lawyers, but what would be the point? All they're interested in is maximizing the value of every dollar they spend on advertising and if the data says do it that's what you do.