A cache is a temporary storage area in a computer or device's memory that holds frequently accessed or reusable data to speed up performance and reduce loading times. In the context of the internet and digital photography, a cache stores elements such as images, web pages, and files, allowing them to load more quickly when revisited. Cache settings can often be adjusted to store more or less data, helping photographers and users optimise browsing speed, manage storage, and improve workflow efficiency when working with online galleries or image editing tools.