What's an example of personalization?

Personalization involves creating things such as products, services, or content specifically for you by considering your unique preferences, interests, and qualities. It’s similar to receiving a custom-designed experience that fits you ideally.

For example, think about a music streaming application like spotify that offers song recommendations according to the genre of music you have previously enjoyed. This is an instance of personalization!
Another most common example of personalization is YouTube which shows and recommends videos based on the contents you watch.