Google has always looked for the attributes that consumers search for about a business. like which coffee shop offers Wi-fi. Reviews that have been naturally stated have become entities left by reviewers that Google can use. Today this data can be positive or negatively attributed to a business in the Local Finder from new attributes that someone can fill in. It is hard work but worth it to try to prompt the reviewer to use words that include the specific service they used. Include smart variables in your review request that lead to this. Avoid asking yes and no questions; approach a review request with open-ended questions.