It’s one of the Most Efficient, cost-effective services your bank offers. The Automated Clearing House network—or ACH, for short—has been making life easier for banks and their customers for decades. ACH is an electronic network that facilitates a colossal number of transactions between financial institutions in the United States. Last year alone, ACH processed more than 21 billion transactions worth a total of $36.9 trillion. HOW DOES AN ACH TRANSACTION…