Canon EF-M 15-45mm F3.5-6.3 IS STM is an Auto Focus (AF) Wideangle Zoom lens with APS-C / DX max sensor coverage. When mounted on a APS-C / DX sensor camera, it will give you an FF equivalent focal range of 22.5 - 67.5mm. With a max aperture of f3.5 at 15mm, we can not consider this lens fast on wide end, and it is slow at the tele end with its max aperture of f6.3.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Canon EF-M 15-45mm F3.5-6.3 IS STM is not a weather sealed lens, so you have to be extra careful against rain and dust.