Google Analytics is becoming a popular analytics tools recently as website analytics tool. Online marketing is a very important channel to communicate with customers and there needs to be ways to analyze how customers interact with online channels. Google Analytics is becoming a default medium to do such analyses.
As SEM, Search Engine Marketing, is becoming a common task for marketing profession, knowledge of Google Analytics and other webpage analytic tools are finding success.
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Google Analytics link

Google Analytics Partners page

Google Analytics is providing a Certification that is also useful both new employees and companies who are seeking talent in Search Engine Marketing.

Google Analytics page

You can also watch me pass for the Google Analytics Certificate exam. Hope this will be a valid study material.