SAT is the most popular standardized test used in the college admission process in the United States. (
ACT is the second most popular test.) SAT is developed and administrated by the
CollegeBoard.
This test, as mentioned by the Collegeboard, indicates the readiness of a student for college education. More precisely it is said to measure the literacy and writing skills that are needed for academic success in college. It consists of three different sections which are Critical Reading, Mathematics and Writing. Writing section is a new addition to the test, which was added only a few year ago. The full marks of each section are 800 so the total score of SAT is 2400.