Yelp is a site were you rate your experience at Restaurants and other local business.
People sign up for this site and give reviews good and bad.

What happen in friends case is, he owns a small mom and Pop Filipino restaurant.

When you looked at his yelp reviews it was all 4 to 5 stars (5 stars being the best)
He gets a call one day from yelp Rep.
This Yelp Rep tells him,he can hide any and all negative reviews for a monthly fee.
He tells reps to "go kick rocks".
One month later all the good reviews disappear and a bunch of negative reviews start piling up!
One month passes and the yelp rep calls back wanting more money to make negative ratings disappear:wtf:

Google yelp and see all the shit they try to do!