It can be extremely beneficial having a star rating appear next to your brand in Google search results (they are eye catching and help stand out from competitors; they provide an element of social proof for travel shoppers; they boost click-through rates and increase traffic to your vacation rental website).

Various factors influence getting a star rating on Google:

• Google gathers review data from „trusted“ review sites (provide an exceptional service and ask your vacation rental guests to write a review). When guests write a review about your holiday home on your Google Business Listing, it not only helps your star rating, but increases your chance of being selected for the local listing section.
• Google is able to extract relevant information from your website (rich snippets – structured data – schema markup code) – for example, if you use a review widget to embed reviews.
• Your website’s authority can influence your star rating on Google as well. Share helpful content for your guest. Ensure, that your website is SEO-friendly.
• Note: Be patient. A star rating in Google search results won’t appear overnight.

(Source: via @VFMLeonardo – Get the full story at vizlly http://www.vizlly.com/blog-google-star-rating/ )