A zero client is like a computer that does not have a brain of its own. Instead, it relies on another computer to do all the hard work. It is kind of like a puppet that needs a puppet master to move its arms and legs.
The zero client connects to a server computer, which does all the processing and hard work. The zero client only displays what the server sends to it, like a TV showing a show that somebody else is controlling.
This means that the zero client does not need a powerful processor, a lot of memory or storage space. It is small, lightweight, and uses less power than a regular computer because it does not do any heavy lifting.
Zero clients are useful in places like offices, schools, and hospitals where there are many people who need to access the same programs or applications. Instead of having a computer for each person, a server can be set up, and everyone uses the zero clients to access it. This saves a lot of money on equipment and maintenance costs.