As reported in Search Engine Land, Google AdWords just released a new feature for its Location Extensions that allows ratings stars be shown on PPC ads. For example, if your ad campaign shows your location as Fort Wayne, the ratings stars are seen after the location info. Businesses with an AdWords account linked to their Google My Business location information, and have enabled location extensions will have their ads automatically eligible for this addition, needing no further actions for activation.
One thing to note is that the addition is optional. Why is this so? Ratings stars can be helpful or harmful to your internet marketing efforts. If your current average rating is 4-5 stars, then you’d want to show it. If it’s lower, you’d probably want to leave it out. You won’t be able to show your rating if it’s lower than 3.5 stars anyway.