To personalize means to make something or an experience more relevant and tailored to a specific individual's needs, preferences, or characteristics. It involves taking into account someone's unique qualities such as their interests, tastes, opinions, and habits in order to create a product, service, or environment that is specifically designed for them. Personalization can be applied to various aspects of life including marketing campaigns, customer service interactions, and even personal relationships. The goal of personalizing something is to make it more engaging, effective, and meaningful for the individual in question.