Dopamine is a chemical messenger in the brain that plays a key role in how we feel pleasure and motivation. It helps us experience joy from activities we enjoy, like eating our favorite food or spending time with friends. When we do something rewarding, our brain releases dopamine, making us want to repeat that behavior. This neurotransmitter is also important for movement and coordination. Low levels of dopamine are linked to conditions like Parkinson's disease, which affects movement, while high levels can be associated with addiction and other mental health issues. Understanding dopamine helps us learn more about our emotions and behaviors.