A vaccine’s main goal is to teach your immune system to recognize and remember a bacteria or virus.
The word “vaccination” means to stimulate the immune system to make antibodies against the bacteria or virus targeted by the vaccine.
“Immunization” is different; it’s used in relation to injecting a person with pre-formed antibodies to a particular disease to make the person immune to it.
These terms are often used interchangeably, and that’s just fine, however it’s important to understand that these are two very different ways of creating immunity to a disease.