What does Cache mean?
A cache is temporary storage that keeps previously loaded or calculated data ready for reuse. This speeds up access, but may temporarily display older content.
AN EXAMPLE IN PRACTICE
Where you might encounter it
After a website update, a browser may temporarily still show the old icon. The file is in the cache. New filenames or suitable cache rules can help serve updated files.
From NetzTurm Decode. Clear explanations with historical context.