The Canon 55mm Protect Lens Filter (8269B001) is a lens accessory that helps protect the front element from dirt and damage. It is intended for everyday use as a protective layer in front of the lens.
The filter fits lenses with a 55mm filter thread. Canon lists it for the EF-M 11–22mm f/3.5–5.6 IS STM, EF-M 18-150mm f/3.5-6.3 IS STM, RF-S 18-150mm F3.5-6.3 IS STM, RF 28mm F2.8 STM and RF-S 55-210mm F5.0-7.1 IS STM. This gives owners of those lenses a straightforward way to add front-element protection while shooting.