There is no definite answer regarding one-to-one marketing versus mass marketing. Both have unique advantages and disadvantages. With mass marketing, businesses can reach many people relatively quickly and at a lower cost than one-to-one marketing. However, the messages sent out are not tailored to individual consumers, so they may not be relevant or interesting to them. As a result, consumers may be less likely to respond to or buy products or services that are marketed in this way. One-to-one marketing allows businesses to target specific individuals with personalized messages that are relevant to them. It can increase engagement and conversion rates, as consumers are more likely to pay attention to and act on messages tailored to their interests. However, one-to-one marketing can be more time-consuming than mass marketing, as businesses need to invest in developing relationships with individual consumers.