ATP, or Adenosine Triphosphate, is a molecule that stores and provides energy for many cellular processes in the body. Here's a simple breakdown:

1. ATP is like a rechargeable battery: When your body needs energy, it breaks down ATP and releases energy. This process converts ATP to ADP (Adenosine Diphosphate).

2. ATP can be recharged: Your body can turn ADP back into ATP by adding a phosphate group, using energy from food you eat.

So, in simple terms, ATP is a critical energy carrier in the cells of our bodies. It's like the fuel that powers your body's activities.