Overclocking is a way to make your computer go faster than it's supposed to. When you buy a computer or a part like a processor or graphics card, it has a set speed that it's meant to run at. But if you overclock, you change the settings to make it go faster than it normally would.
Think of it like a car. A car has a certain speed limit it's supposed to go, but if you push the gas pedal harder, you can go faster. But if you go too fast, you might get in trouble with the police or end up crashing, just like if you overclock too much, you can damage your computer parts.
You can overclock different things in your computer, like the processor, graphics card, or memory. It can make your computer run faster and handle more tasks at once. But it can also cause problems like overheating or crashing if you don't do it right.
Overclocking is something that should only be done by people who have experience and know what they're doing. If you're not sure, it's better to leave it alone or ask for help from someone who knows about it.