JPEG (or JPG) is a widely used digital image file format that compresses photographs and images to reduce file size while maintaining reasonable quality. The format is named after the Joint Photographic Experts Group that created the standard. JPEG compression makes files smaller by removing some image data that human eyes are less likely to notice, though this means some quality is lost. Municipalities commonly use JPEG format for photographs in reports, websites, and permit applications because the files are small enough to share easily. Understanding file formats helps citizens submit documents correctly when applying for permits or accessing municipal services online.