The Scholastic Assessment Test is a standardised test that is widely accepted by universities all around the world. It measures students' academic skills and knowledge and consists of 3 areas of study: Reading, Writing, and Mathematics.
You can appear for the test in March, May, June, August, October, and December. The test is three hours long with the highest possible score being 1600. The SAT is a globally recognised test which means that your SAT score is accepted by colleges worldwide in various countries like the US, the UK, Canada, and Australia. Indian universities also accept SAT scores but only those which come under the alliance with the College Board. You can find out more about which colleges accept SAT scores on Yocket.