Image resolution - not good on stage

 Hi, We are seeing that the image resolution is not as good as the image that is uploaded into Woo-commerce site when used as a layer. Is this a drawback in the plugin or is there a setting to keep the image resolution as the original image uploaded?

We will have various brochures and Door Hangers on which there will be some text that should be readable by the user.

Please advise. Thanks