How to blur background

What Is Blur And its Meaning?

blur

v. blurred, blur·ring, blurs

v.tr.

1. To make indistinct and hazy in outline or appearance; obscure.

2. To smear or stain; smudge.

3. To lessen the perception of; dim: "For street children . . . drugs offer the chance to blur their hopeless poverty" 

v.intr.

1. To become indistinct.

2. To make smudges or stains by smearing.

n.

1. A smear or blot; a smudge.

2. Something that is hazy and indistinct to the sight or mind.

Advantages of blur:

Blur is essentially the UI and apps Motorola includes with their phones. Things like the social widgets, the default home screen/launcher, and the "style" of the text messaging and dialer apps are MotoBlur (may a dev correct me if I'm wrong, I know I'm leaving a lot out). I believe AOSP/stock Android alternatives to Blur apps/widgets save battery a bit more. If you don't really use Facebook/Twitter, you won't be missing much. It's more of a stylistic preference.