Ian Sigalow of GreyCroft said that personal reviews of products can increase conversion rates by 100% or more.

FORBES: Lessons Learned at Stanford's Digital Marketing Program

According to him, local search requires the right combination of a myriad factors, such as Yellow Pages, personal reviews, mapping and even social networking.

FORBES: Searching For Main Street

Pooled information, often in the form of personal opinions and reviews, is a freely traded currency, a form of entertainment in itself.

FORBES: The Ultimate Broker

You could leave your friends personal notes or restaurant reviews by dropping message chips that come alive when your friends' sensors come into range.

FORBES: Magazine Article

As an aside, it's neat to see user reviews built into a personal navigator, which isn't exactly a typical feature.

ENGADGET

Single-word reviews, for instance, or personal attacks on the author, are not allowed.

ECONOMIST: Amateurs on Amazon

The power of a personal recommendation is coming full circle as it becomes easier to share and find reviews and ratings on local shopping apps.

FORBES: A Look At The Boom In Location-Based Services