The term 'Guitarist's Aids' refers to items that are used by guitarists to help them play their instrument. The most common of these aids are plectrums, which are small pieces of plastic or other material used to strum the strings of a guitar. Plectrums come in various shapes and sizes and can be made from a variety of materials, such as plastic, metal, or even bone. They are essential for playing certain styles of music, such as rock and metal, and can also be used to create different sounds and textures.