With more and more business building an online presence, a useful original domain name may be difficult to find. However, dropped domains may be the perfect opportunity for you to begin building your business's online identity.
A dropped domain means that it has expired. The owners hasn't renewed the licence with their domain registrar. The registrar can sell the domain at auction.
Take a look at this infographic from Whoishostingthis that illustrates how to find and buy dropped domains.