COLUMBIA, Md.--(BUSINESS WIRE)--Merkle (www.merkleinc.com), a leading technology-enabled, data-driven performance marketing agency, has been recognized by The Relevancy Group as a leader in “The Relevancy Ring: Email Agency Buyer’s Guide – 2015.” The Relevancy Group, a leader in email marketing research and consulting, released its first ever buyer’s guide, which analyzes seven vendors and sheds light on which agencies improve the ROI of current email marketing technologies. “What differentiate


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