The difference between customization and personalization can be confusing. Do you customize something to personalize it, or personalize something to customize it?
One of the reasons these terms are blurry is that personalization is a relatively new concept in some areas.
Personalized medicine is new. It uses genetics to tailor a treatment that has been customized for each patient.
Personalized learning has been around for a long time. From the teacher’s perspective, personalization means designing learning experiences that provide students with choices they can make depending on their own needs.