When to choose JPG over PNG
JPG is the safe choice for email attachments, older CMSs, marketplaces and anywhere that rejects SVG and PNG transparency is not needed. For flat logos a PNG is usually smaller and sharper; JPG wins when the SVG contains gradients or embedded photos.
Quality settings
85–92% is visually lossless for most artwork. Below 75% you will see blocky artefacts around sharp edges and text.