Finding your target market is very important; in all walks of life. You could be inventing, job hunting, writing, etc.
Mostly, a target market is considered something that businesses need to identify and market to. Before opening a business, you should have a very good idea what your target market is.
If you’ve just launched a startup, you’ve likely spent a lot of time planning and building your business. Part of that planning process involves—or should involve—deciding who will be on the receiving end of your marketing efforts.
Your products might appeal to a large group of people, but it doesn’t make sense to try to market to everyone
Selecting a target audience will help save you resources. Focusing on a portion of the people who might be interested in your products will allow you to communicate and engage with that segment more deeply.