Okay, imagine you have a big bowl of candy. Now imagine you have a friend who really likes candy, but they can only have one piece. You can't give them a whole bowl of candy, but you can give them one piece.
The dirac measure is kind of like that one piece of candy. It's a special way of measuring things that only "counts" one specific value.
For example, imagine you have a number line with all the numbers on it. The dirac measure is like a little dot on that number line that only "counts" one specific value. So if you have the dirac measure at the number 3, it means you are only measuring things that happen exactly at the number 3.
This might not sound very useful, but it's actually very important in things like physics and engineering. Sometimes we need to measure things very precisely at one specific value, and the dirac measure lets us do that!