“The SAT test originated in the United States of America as a response to the decentralized education system across states. This decentralization led to variations in curriculum and grading scales. Consequently, a student from one state with a 3.5 GPA might possess a higher level of intelligence compared to a student from another state with a 4.0 GPA due to the differences in their respective curricula. The SAT test was introduced to provide a standardized evaluation that transcends these variations, offering colleges and universities a more objective measure of a student’s academic abilities and potential. By assessing a wide range of skills and knowledge, the SAT aims to provide a fair and consistent benchmark for students across different educational backgrounds.” Here is a link of a video that will help you understand more  https://youtu.be/V4AqQUGWS9E?si=bHH5OFlTLfo6OvTq