The Cafe World buzz rating is an important feature of the game. It is like a "word on the street" rating for your cafe. The more customers that leave with a thumbs up attitude the higher you buzz rating goes.
In the upper right hand corner of the Cafe World screen there is a thumbs-up image and a numerical value. That number represents your buzz rating. The buzz rating determines how many customers come to your Cafe. If the value increases, more people come to visit you and you will earn more money. If it goes down, so does your customer traffic and potential earnings.
To make you cafe world customers happy you need to make sure there’s always cooked dishes available on the counters. You should lay out your cafe so your customers do not wait too long for their meals. If a customer leaves unhappy you buzz rating will go down significantly.
The highest cafe world buzz rate you can achieve is 105.0.