Personalization is the practice of customizing something to fit an individual person's preferences, needs, or characteristics. When you personalize your backpack with patches and pins that show your favorite bands or hobbies, you're making it uniquely yours. When a website remembers your name and shows you book recommendations based on what you've read before, that's personalization too.

Personalization takes something generic and makes it special for someone specific. A teacher might personalize their approach to help different students, explaining math one way to a visual learner and another way to someone who learns better through discussion. A birthday card becomes more meaningful when you personalize it with an inside joke or a memory you share with the recipient.

In technology, personalization often means systems that adapt to your behavior. Streaming services personalize your homepage based on what you watch. Video games might personalize difficulty levels based on how skilled you are. While this can be helpful, it also means these systems are collecting information about you to make these customizations, so it's smart to pay attention to privacy settings.

The key idea is adaptation: personalization means adjusting something to suit the individual rather than treating everyone exactly the same way.