Sheep shearing is when someone takes the wool (the big fluffy coat) off a sheep. It's important to do this every year so the sheep doesn't get too hot and uncomfortable, and so people can use the wool.
First, the sheep has to be brought into a special area where it can stay still. This area is usually called a pen. It's kind of like when you go to the doctor and you have to sit still in a special chair.
Next, the person who is doing the shearing (usually called a shearer) will use special scissors called shears. These are really big scissors, bigger than the ones you might use at home. They're kind of like giant, shiny mouths that open and close really fast.
The shearer will carefully cut the wool off the sheep's body. They will try to make sure the sheep doesn't get cut, but sometimes it happens by accident. That's why it's important to have someone who knows what they're doing.
After the shearing is done, the sheep looks a bit funny because it doesn't have its fluffy coat anymore. But it's good for the sheep because it won't get too hot, and it's good for us because we can use the wool to make things like jackets and blankets.
Overall, sheep shearing is like getting a haircut for a sheep. It's something they need, and it helps us too.