Well,
If you want it to physically ‘pop out’, you’ll need Geometry, especially, but not only, because it is not going to be flat, but going around the Cylinder.
Often, a Simple Deform Modifier, set to Bend gives better results then trying to use a Curve (but you’ll still need enough Geometry).
You could also use a Solidify Modifier with a Vertex Group to isolate it to the ‘pop out’ part, but again, you’ll still need the Geometry.
Maybe, you could get away with faking it, by using a Bump Map.
