When you have a highly specific product or service, there will be less companies out there with the exact same offering. For example, there are millions of companies out there that sell knives. There are fewer companies that sell knives with handmade wooden handles, and yet fewer that offer customized knives with your initials on them. The more specific your product or service, the less companies there will be to compete with you for customers, and the harder it is for them to duplicate your strategies.
Every product cannot be defined by its market niche. The niche market is highly specialized, and aiming to survive among the competition from numerous super companies. Even established companies create products for different niches; Hewlett-Packard has all-in-one machines for printing, scanning and faxing targeted for the home office niche, while at the same time having separate machines with one of these functions for big businesses.