The wget command is used to retrieve content from servers via HTTP, HTTPS, and FTP. It simplifies many downloading tasks that you'd normally have to do yourself by perusing a website and manually clicking links to download. Wget is able to perform the same function from the command line and has a lot of added abilities that can save you time, such as downloading directories recursively.
This is a companion discussion topic for the original entry at https://linuxconfig.org/wget-file-download-on-linux