Google has become the default search engine. It is fine for routine queries. However, if you are searching any topics that are controversial, frowned upon by your rulers (government), or frowned upon by the religious establishment in your country, you should use Ixquick.
Google TRACKS you, and keeps records for various government and commercial snoops. For the time being, until the European Union forces Ixquick to track you, it does not now track you.