In order to rank higher in local search results, Google looks at several factors. Three important are: Relevance, Proximity and Prominence. While you may not be able to chance your proximity, the other two factors are within your control to influence your opportunity to improve your visibility within the 3-pack listing.
Your business has several web properties on the Internet. These properties may include your business website, Google My Business (GMB) page, Social Media pages (such as Facebook Page, Twitter, Instagram, YouTube, Directory Listings – Yelp, Yahoo! Small Business, Local Yellow Pages, etc.).
Each of these web properties impact your online visibility to various degrees as well as your online business reputation. You therefore need to bring them all into your online marketing strategy in order to bring your digital strategy in line with your overall business strategy. For that, you need the level of data intelligence that only a well configured and executed SEO audit can deliver.