People use luggage straps for three primary reasons: security, durability, and visibility. First and foremost, a strap acts as a secondary fail-safe; if your suitcase's zipper fails or the shell cracks during the rigorous baggage handling process, the strap keeps the bag tightly closed and prevents your belongings from spilling out on the tarmac or carousel. Secondly, it provides an added layer of security against casual theft or tampering, especially if you use a strap with a TSA-approved lock. Thirdly, in an era of generic black suitcases, a bright or personalized luggage strap makes your bag instantly identifiable at baggage claim, reducing the risk of someone else accidentally grabbing it and saving you time at the airport. Some travelers also use straps to "bundle" smaller items, like a jacket or a neck pillow, to the outside of their bag for easier transport. Ultimately, for a small investment, a luggage strap provides peace of mind that your luggage is reinforced against both mechanical failure and the chaotic environment of international transit.