If you've ever bought a new computer, you know it comes pre-loaded with a bunch of "value-added" third-party software that includes "useful" freebies and trial programs. Most of them you don't need and won't ever use, which is why in the tech world we've dubbed it "bloatware."
Unfortunately, bloatware didn't stay on computers, but found its way to smartphones, too. Even worse, while you can uninstall bloatware from a computer, you can't uninstall bloatware on a smartphone; you just have to hide it or disable it. Fortunately, at least one smartphone player is rethinking this policy.
If you have an Android smartphone, you might notice you have Google+, Gmail, Google Play Books, Google Newsstand and more installed by default. And you can't get rid of them, even if you're never going to use them.
The reason they're included is because Google requires phone manufacturers to include a list of Google apps if they also want access to the Google Play Store. As Google Play, and its 1+ million apps, is a major selling point for Android phones, most manufacturers go along with it.