I once heard a new business owner define their target market as … wait for it … “everyone”.
*cringe*
While it’s nice to believe that everyone would be interested in purchasing your product or service, it’s not wise to define your target market as such.
Not only does this definition (or lack thereof) create way more work for you; it also does a disservice to your actual target market — by over-widening your scope, you fail to inform and educate your audience about how your product or service can improve their lives.