As much as I love Google's ability to find exactly what I want, I've grown concerned about the amount of data they collect from my searches. You've probably experienced that lovely phenomenon of casually searching for a product and then seeing ads for that same product all over the 'net. Luckily for those concerned about such things, there's DuckDuckGo, a search engine that makes privacy its number one concern. Even more luckily, Apple's added it to iOS 8's list of search providers.
Switching your default search engine is actually quite easy. Head to Settings > Safari > Search Engine, and select DuckDuckGo. Boom, it's simple as that. So simple, in fact, that you should really consider giving it a try. If you don't like it, it's easy to switch back. And if you want to do occasional searches on other sites, just go to google.com (remember when you used to do that every time you wanted to search for something?). Enjoy!
DuckDuckGo Selection in iOS 8 Settings