Retailers have leveraged customer data for the benefit of their brick-and-mortar stores for decades. But how has that changed with the explosion of big data? (Read: 400 million tweets a day, and the prospective digital data equivalent of 18 Libraries of Congress by 2015).

Monetate and Column Five created an infographic to answer that question.

If you’re in the retail business – either on the selling or shopping end of things – you’ll want to take a look.

For a different angle, check out this infographic on The Retailer’s Guide To Social, Local And Mobile – which is the addition of local information to search engine results – that we shared a few months ago.

(Infographic via Column Five, Image via Shutterstock)