Knowing your target market is a core part of your business plan and go to market strategy.

Survey potential customers, find the pain points, offer them a solution which solves it and if they can't live without it you've got a winner.

There may be some information online but this is a pretty important part of the process to get right and will require a lot of manual research so that you don't end up creating a product there is not a need for and making sure there are (enough) customer out there willing to pay.

Good luck!