Checkout list of major Google updates happened in local search with the time.

1. HISTORY OF GOOGLE UPDATES RELATED TO
LOCAL SEARCH
Google SEO Updates History- FATbit Technologies

2. HOW LOCAL SEO CHANGED WITH TIME?
Local search has become one of the core areas for
Google. It has gone through leaps and bounds over the
years to provide users with an immersive experience of
finding relevant information depending upon their
location. From local businesses on Maps to Google My
Business, the search giant has definitely bridged the gap
between the users and businesses. Moreover, its location
based algorithm changes have also added relevance to
the search results.
Google SEO Updates History - FATbit Technologies

3. LOCAL BUSINESSES ON MAPS
First time in 2005 Google took first step towards
localization of local search.

4. LOCAL BUSINESSES IN SEARCH
In 2007 Google Started showing local business
information in in organic search to answer
queries with location factor

5. LAUNCH OF GOOGLE PLACES
In April 2010 Google launched Google Places which
presently known as Google My Business .

6. GOOGLE’S OWN SOCIAL NETWORK
Google launched G+ on June 28, 2011 and local intent
searches got another twist.

7. GOOGLE’S HUMMINGBIRD UPDATE
With Google Hummingbird in September, 2013 search engine results
got a qualitative change. Google’s Hummingbird update, though
about synonyms and context, also influenced local search results and
benefited local businesses

8. GOOGLE PIGEON UPDATE
The latest development in local SEO happened with
this Google update named pigeon by Search Engine
Land (rolled out in July 2014

9. TO READ HOW GOOGLE EVOLVED, IMPROVED
SEARCH, AND CHANGED SEO ON THE WAY.
GOOGLE SEO UPDATES HISTORY :
HTTP://WWW.FATBIT.COM/FAB/GOOGLE-IMPROVED-SEARCH-
CHANGED-SEO-LAST-17-YEARS/