PLA filament is a type of 3D printing material made from polylactic acid, a biodegradable thermoplastic derived from renewable resources like corn starch or sugarcane. It is popular among hobbyists and professionals for its ease of use, low warping, and vibrant colors. This filament is ideal for creating prototypes, models, and decorative items. However, it has a lower heat resistance compared to other materials, making it less suitable for functional parts exposed to high temperatures. Overall, PLA filament is a great choice for beginners and environmentally conscious users.