I agree with Ben’s points above. The key once you’ve narrowed down the specific verticals is to connect with customers/potential customers/prospects (aka your target persona), and ask questions to identify their pain point/s when it comes to insights and how they would measure the success / value your product would bring.

You can then use this information to refine the vertical/s you should target, and craft the demand generation strategy (including content strategy at each touchpoint in the journey) so as to ensure you are delivering the right information, in the right format, at the right time.