Why do girls use liners?

Why girls use liners, specifically panty liners, is for feminine hygiene, freshness, and light protection from vaginal discharge, spotting, light periods, and light urinary leaks, keeping underwear clean and feeling comfortable throughout day. Girls and women naturally have daily vaginal discharge which varies during menstrual cycle, especially around ovulation, which can stain underwear, so liners absorb this discharge. They use liners as backup with tampons or menstrual cups in case of leaks, for very light period days at beginning or end when full pad not needed, for spotting between periods, and for light bladder leaks when coughing or exercising. Liners provide feeling of freshness and confidence, preventing odor and moisture. Some use liners daily for cleanliness. Other liners like nursing liners used by breastfeeding mothers for milk leaks. So girls use liners for hygiene, to keep underwear clean from discharge, for light period protection, and for freshness and confidence in daily activities.