The criteria and metrics can be classified according to its type and time span. Regarding the type, we can either evaluate these campaigns "Quantitatively" or "Qualitatively". Quantitative metrics may include "Sales Volume" and "Revenue Increase/Decrease". While qualitative metrics may include the enhanced "Brand awareness, image and health" as well as the "relationship with the customers".
It opens the door for irrelevant, spammy, automated messages. Understanding that a large database of leads is required for marketing automation to have any effect on their bottom line, many marketers end up buying lists of contacts to nurture with marketing automation. The consequences of list-buying are numerous, but most importantly this spammy tactic produces incredibly low ROI. Along with the cost of buying these lists, sending unsolicited emails to people who have never requested any information from you leads to low engagement and hurts your IP address reputation, lowering your email deliverability rates.
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