Overfitting

Overfitting is when you use something (like a machine learning model) to try and make predictions but it gets them wrong a lot. It happens when the model is too complex and it doesn't understand the pattern it's trying to predict. It's like if you made a cake recipe and you added a lot of ingredients, but it didn't turn out right. You can fix this by taking out some of the ingredients, or by simplifying the model you made.