Since the great majority of CPG purchasing occurs in-store, how important is digital in the path to purchase?

The title of this post is the question that Joel Rubenson asked Catherine Roe, head of CPG for Google. What stumped me was the sheer volume of “interest / passions” related searches, which just goes to indicate the opportunities for the CPG marketers. Catherine reports that searches on Google.com re

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Since the great majority of CPG purchasing occurs in-store, how important is digital in the path to purchase?