The only feature ported from Photoshop, Layerstyles are a quick way to add a variety of simple filters to a given layer.
As many studios and proffesionals work in an enviroment where these are ubiquitous, Krita supports them so you can have a proper file exchange with your collegues and clients.
Layerstyles can be found under
Makes a drop shadow underneath the layer.
Makes a dropshadow inside the opaque areas of the layer
Gives the layer a glow outline.
Gives the layer a glow on the inside.
Adds bevels to the layer shape.
This allows you to set the contour of the bevel.
This allows you to influence the bevel with textures.
This makes two copies of the layer and offsets them in opposite directions, giving a satin-feel.
This overlays a colour over the layer's full shape.
This overlays a gradient over the layer's full shape.
This overlays a pattern over the layer's full shape.
This outlines the layer with a even stroke.