Many times when I am lost in world of internet . I use this as weapon. For example I want to know best hangout place in neighborhood place. or coffee shop or review of certain place, item etc. I use Google.com as search engine.
The main reason for using it is cause its easy to use feature. It has many other feature like showing streamlines search result based on tabs mention in its page. Eg: If you type something like Mouth shut and click on search it gives web search where as there are other tabs like images, maps so on and so forth.
Google.com covers most of things that are there on internet. its easy to use and best result giving algorithm makes it one of the best search engine around the globe.