Using Google Trends for Local Optimization?

Below is a list of url's that direct to information about local and national search optimization using Google Trends.

First what is Google Trends?

http://searchenginewatch.com/article/2317503/Expanding-from-Local-to-National-SEO-with-Google-Trends?goback=.gde_61126_member_5814766138084569090#!

http://searchenginewatch.com/article/2292198/How-to-Use-Google-Trends-for-SEO

http://searchenginewatch.com/article/2305421/315-Businesses-Boost-Rankings-by-Optimizing-Their-Google-Local-Pages-Study