What is the yongnuo yn50mm f 1 8 da dsm good for?

Here is what the site says about that.

From Yongnuo YN50mm f/1.8 DA DSM: Yongnuo YN50mm f/1.8 DA DSM: A prime lens by Yongnuo for APS-C cameras, 50mm f/1.8. Specs - Maker: Yongnuo - Focal length: 50mm (prime) - Maximum aperture: f/1.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 75mm on full frame; f/1.8 gives about the depth of field of f/2.7 there. - On the larger-sensor ...

From Yongnuo YN50mm f/1.8 DF DSM: Yongnuo YN50mm f/1.8 DF DSM: A prime lens by Yongnuo for Full frame cameras, 50mm f/1.8.

Quoted from this site's pages.