Copying files from the internet to your device. Like bringing items from a store to your home - the file moves from somewhere else to your computer.
When you download a song, it gets saved to your phone so you can listen to it even without internet.
“Download” is a general networking action (data moving from a remote system to a user device). Cloud providers don’t have a single “Download” service; downloads typically happen when you retrieve data from services like object storage (e.g., S3/Azure Blob/Google Cloud Storage/OCI Object Storage) or when users fetch content via a CDN.