Internet Search Trends of "Marketing Automation"

One of the ways to gauge interest in a topic or product is to measure Internet search trends over time. As you can see from the chart below, the phrase "Marketing Automation" has trended up, albeit not in a straight line, from 2007 through 2013. Note that the chart data is in index form where the highest results are "indexed" to 100 and other data points are relative to that.