Condensed milk is a thick, sweet liquid that is made by removing water from regular milk. Imagine you have a glass of milk and you leave it outside for a long time. The milk will start to evaporate, which means the water in the milk will start to disappear and what's left is a thicker, creamier liquid.
Now, imagine doing this on purpose! Rather than leaving the milk out, a machine is used to remove the water from the milk. This makes the milk become thick and syrupy, which is called condensed milk.
Condensed milk has a lot of sugar in it, which makes it taste very sweet. This is why it's used in desserts like fudge, ice cream, and pies. You don't need to add extra sugar to your dessert when you use condensed milk because it's already very sweet.
Overall, condensed milk is just like regular milk that has the water removed and lots of sugar added to make it sweet and thick. Yum!