“Communities” will replace the old model of marketing personas, according to a recent report. For decades, many companies have used “personas,” a description of their target audiences for marketing. For example, a brand publishing marketing content on its website may instruct the writer to aim content at one of its audiences such as “goal-setting millennials,” ‘Baby Boomers nearing retirement” or “tech-savvy Gen Xers” by providing personas of character traits within that audience group. However,...