It didnt become , it is already a king. As it is the best of all. In this world now Google has become other name of internet
10 years back according to Alexa rankings,yahoo was more popular than Google.the number of persons with yahoo mail was more than g mail.yahoo homepage was more visited than Google home page.
from that situation, yahoo has been taken down the road by Google .that is like becoming the king and overthrowing the former king.
