Jim answers questions from fellow Drillers (More questions with answers here , Work Overview here , Index of concepts here ) Topic Overview Hi again folks, Jim Novo here. Today, we’re asked for a simple definition of retention. Problem is, the data / biz model really creates the definition. Meaning, you gotta match the creation of metrics with the actual actions.  So I call for segmentation first so we can put some “actionable” stuff in the mix. Make sense? Let’s do the “simple” (easy? maybe not) Drillin’ … Q:   For an online retailer, what is the best way to gauge retention in its most basic and simplest form?  % of orders that are from repeat buyers?  % of orders in month 2 who are repeaters that first bought in month 1?…