Optimising refers to the process of adjusting a digital images data without removing pixels, to make the file size smaller while retaining visual quality. This is particularly important for web use, where images need to load quickly without sacrificing clarity or colour accuracy.
Many software programs offer auto-optimising features that convert images to formats like JPEG, apply efficient compression, and select appropriate colour palettes. Proper optimisation ensures that images look as close as possible to the original, while reducing bandwidth and improving website performance, making it a key step in digital photography and online publishing.