Google is better at providing information than Bing or any other search engine or directory that I know of.
Ask.com is a directory (it used to be called AskJeeves.com). Directories are sorted by humans to provide maximal information.
Google and Bing are search engines. Search engines have algorithms that locate information. The work by seeing how often words are associated with one another.
Duckduckgo and Ixquick are search engines that protect your privacy. Google does not protect your privacy. Google was caught hacking into computers as they flew (under the required 500 foot limit) to photograph so-called satellite images of private property (to form Google/maps). It was a joint effort of the FBI and Google (each paid for a share of the costs, but the FBI has finer resolution on their maps). The Google website used to go into detail about the cooperative venture with the FBI.
Google, presumably for the best interests of users, tracks preferences and searches based on those preferences. This makes "bubble boys" who are stuck inside a bubble of their own interests and cannot view information of contrary opinions. For example, if a Democrat and Republican looked up "George W. Bush," the Republican would find websites describing W. Bush as a saint, while the Democrat, search exactly the same information, would find websites describing W. Bush as Satan incarnate. You can select preferences in the Google search engine to not allow preference tracking, though I am not sure that it works (Big Brother might be watching what you choose to look at). Google makes the false claim that it protects the privacy of its users. Imagine a world in which search engines catch people if they look at banned information. This is apparently the real agenda of Google. They might label people to be communists or perverts (though there is no way to determine who was using your computer in your absence).
The Federal government bought its own search engine (it was a private search engine called Northern Lights). It had been part of an intranet (which is a private internet that is shared by other government facilities but not accessed as part of the internet). That is spelled intranet, not internet. Fedworld now uses that search engine for the general public, and it might be a bit better at searching for Federal information that other search engines.
Google has the ability to search websites. It can also search for information on sites by a particular name (using the "site" function). For example, type in your search criterion (for example "George W. Bush)," then type "site:democraticunderground.com." This will find all references of George W. Bush on that website.
The Google search engine used to be a lot better about 10 years ago. It used to be better at finding pertinent information. But, they changed that by search all criteria (because computer technology dropped in price), but that ruins the ability to search effectively. Though you can still somehow access archived websites (websites that used to exist but have been changed), it is far more difficult than it used to be.
The Yahoo search engine now uses the Google search engine (they are one and the same).