Career assessment is like playing a fun game to figure out what kind of job you might like to do when you grow up. Just like how some games ask you questions to find out your favorite colors or foods, career assessments ask you questions to figure out your interests, skills, and personality traits. Then, they use that information to suggest different job options that might be a good fit for you.
So let's take an example: imagine that you really like helping people and you are good at listening to them when they have problems. A career assessment might suggest jobs like becoming a teacher, a therapist, or a social worker because those are jobs where you can help people and use your skills.
These assessments are usually taken online or with a school counselor, and they can be really helpful because they give you some ideas about what kinds of jobs you might enjoy. But remember that they are just suggestions--you should still take some time to research different careers and think about what you want to do before making a decision!