See https://activewords.com. Need help targeting audience and designing campaign whose goal is to get users to visit the Website and register a free trial of ActiveWords software.
Need to be very granular in audience definition. Top level audience is people who work in small to mid-sized law firms in the US and Canada, and who use computers running Windows.
Already have Google Analytics set up with appropriate goals (trials and sales).
Success of the campaign will lead to more work addressing additional audiences.