Hydron is a funny little guy in chemistry that might sound very serious but is actually very simple to understand. You know when you turn on the faucet and water comes out? Well, that water is actually made up of tiny, tiny things called molecules. These molecules are made up of even tinier things called atoms.
Now, when you take just one tiny little atom of hydrogen and strip away its one little electron, what you're left with is a hydron. It's just a single proton (which is a positively charged particle).
Hydrons are important because they help us understand how things behave in water, which is a really important part of chemistry. When you add hydrons to water, they get pulled around by other parts of the water molecules, which makes them really important for things like pH (which measures how acidic or basic a solution is).
Don't worry if it seems a little bit confusing, though! Just remember that hydrons are like little particles of hydrogen that are really good at helping us understand how water works.