I believe primary and secondary marketing mean different specific things to the rest of the business world. For example, I believe primary marketing mostly refers to the act of selling direct to customers by a sales force or directly contacting prospects by telemarketing or cold call to either make a sale or gain an appointment for another sales person to visit the prospect and attempt to make a sale. Direct mail intended to gain check with order could be considered by some a form of primary marketing.
Cars are a good example of a product sold through secondary marketing.
Car companies advertise to get you to prefer their cars. Car dealers even advertise to get you to prefer their dealership. Of course, these days there are fewer and fewer pure plays in marketing. I suppose many companies do some of both. In finance, the primary and secondary markets refer to the different players in mortgage lending and buying.