Generally you will see that an local search comprises with the business address, phone numbers with the map. but there are very ratings and reviews which effects the minds of the user to think again. The best part is that you can see the trends over the time so that you get an idea how that business goes on. There are many honest reviews and ratings that really helps the people. But some odd bad reviews can make things worse for the businesses on local search.
The power of content does affects the local search ranking in the search engines. The reviews will definitely helps the ranking factors of SEO. It will rank better in to the search engines if that business has good amount of reviews. Which will ultimately help the users. I will look forward to gain more reviews on my blog though its not the local search. Looking for response from your end.