You serach Google but you also search social media and a host of other sites. Whats search comming to.
Search is continuing to grow and expanding to include more and more, as additional sites and sources of information are added to the Internet.
Each of these sites has their own algorithms on how they determine what to show first. For example, Amazon shows products with the most purchases, best reviews, etc. Facebook shows the most relevant in each category - Groups, Pages, members. To rank #1 on each of these mini-search engines, you must know their algorithm (main ranking factors)
The Chrome browser has pretty much sealed the deal. In the past I'd still use Yahoo/Bing but when Chrome came out I stopped using them altogether. It's sad, b/c Bing is a good engine.