n the following excerpt, why does the writer use quotation marks around "market segmentation"?

Successful companies often design products that target the particular needs of consumers; this strategy of "market segmentation" creates a proliferation of unique products that serve a wide variety of consumers $($Gardner & Barefoot, $2013,$ p$.147).$ In contrast to this trend of targeting consumers as specifically as possible, Thompson and Markel $(2014)$ have argued that companies must find common ground among consumers to generate thriving product campaigns $($p$.172).$