Personalization means showing people content or offers that match what they have already shown interest in. Instead of sending the same email to everyone on a list, a business can send different messages based on what each person has clicked, bought, or browsed before. This makes the message feel more relevant, and relevant messages are more likely to get a response. It is not about being clever, it is about respecting that different people want different things. Do you pay more attention to marketing that feels like it was made for you specifically?