When someone says something or someone is the best they are usually referring to the top of the line or the highest level of quality. Being the best at anything usually takes a lot of effort and dedication, and reaching this goal can take many years for some endeavors. If you are the best then there is no one better, and striving for perfection in what you do will help you be much more successful. When you are the best in your field then everyone wants your products, services, or skills.