Remove all signs of Black-Hat from your site if you detect any.
November 29, 2016
Use Google Search Console (formerly Google Webmaster Tools) to associate a geographic location with your site.
November 29, 2016

Include the local information you want customers to know on the main pages of your site.

Spotlight your business name, local address and local landline phone number (no cell phone!) in the footer of each page. This will help your business rank better for local and mobile searches.
Tip: If you have multiple locations then you need to create a unique page for each location with unique content and each location’s local contact details.