One of the advantages of hiring someone from a competition is the knowledge it has on the industry you belong. That person can contribute a lot and make a significant impact on your business.
That’s what Apple just did. They hired John Giannandrea, a former Google’s chief of search and artificial intelligence. However, the reason why he left Google was still unknown. Moving on, he will surely make a great contribution and addition to Apple Inc. especially in AI and Search Marketing.