Here's a detailed guide on how to apply for TSA PreCheck. TSA PreCheck is a program initiated by the Transportation Security Administration (TSA) in the United States, designed to expedite the security screening process for low-risk travelers. It allows pre-approved passengers to pass through security checkpoints with ease, without the need to remove shoes, belts, or light jackets, and without having to take out laptops and liquids from their carry-on bags. This convenience makes TSA PreCheck a highly sought-after program among frequent travelers.