For Mazda, changes in site architecture and search engine algorithms had a decimating effect on rankings for their dealer location pages. The issue was four-fold:
Marketing Mojo cleaned up the directory structure of the store locations and recommended adding a footer link to all pages of the website to that directory structure.
Canonical tags, which refer search engines to rank the pages that you want to rank rather than their identical counterparts on other URLs, were implemented to avoid issues of duplicate content.
The implementation of these SEO solutions had a significant impact on improving many keyword rankings, resulting in the dealer location pages getting found and indexed by Google. Rankings bounced back for the dealer location pages, and top ten rankings were restored for about 70% of them.