Jets are fast aircraft designed for high-speed travel, often used for commercial flights, military operations, and private transportation. They are powered by jet engines, which work by expelling exhaust gases at high speed, creating thrust. Jets can fly at high altitudes, allowing them to cover long distances quickly. There are different types of jets, including commercial jets, fighter jets, and business jets. Commercial jets are used by airlines to transport passengers, while fighter jets are designed for military combat. Business jets provide private travel options for individuals and companies, offering luxury and convenience.