A competitor is something that wants the same thing as something else and they are both trying to get it.
It is most often used in new products so it can set a high price as the product is new and in demand the advantage being then that they would have spent alot of money in research and development of the product so they are making back as much money as possible whilst the product is unique before others start copying. When similar products aré brought out then they would have to compete (compititor bases pricing) in peder to make sales.
tupac played one of the more signifigant roles in the feud. with dre and suge knight making good out of their record lable, death row, tupac signed on and his music started to gain wide spread reconiztion through out east and west coasts. biggie on the other hand was already out promoting his east coast style which would ultimatley be tupacs greatest compititor. as a result tupac glorified west coast rap. tupac was a major contributor in this fued. he did multiple things in favor of westcoast.