Google + pages for your businesses are so much more than just a single link from Google or becoming visible to those that directly see your Google + page. When important Google + members +1 your page a lot of people will see you in the top of Google. You NEED to integrate the +1 button onto all of the applicable pages on your site as well. The number of Google +1's on a page is one of the most important indicators of how Google will rank that page: http://moz.com/blog/google-plus-correlations.
Google+ provides Google with crucial user data for search, allowing it to collect votes about what people like –and that can help tremendously in the search ranking process. Google+ status updates and a +1 thumbs up can now appear in organic search engine results. So, if you add a +1 button to your content or actively publish content to Google+, you’ll improve your chances of dominating search results.