How important are marks in schools?

In Schools, marks are definitely important but I think marks cannot be used to judge a person's knowledge or intelligence. In order to get a promotion to higher class marks are important, they boost our career too. Marks are just a measure of hard-work that a student has put in studying a particular subject. So in Schools marks are important only when a person gets qualified in many subjects and finally gets a job. Education is very much needed in order to move to your next step. If you have a degree definitely you will get a job anywhere.