A synapse is a tiny gap between two nerve cells, or neurons, that allows them to communicate with each other. When a nerve impulse reaches the end of one neuron, it releases chemicals called neurotransmitters. These chemicals cross the synapse and bind to receptors on the next neuron, transmitting the signal and allowing information to flow through the nervous system. Synapses play a crucial role in how we think, learn, and remember. They can strengthen or weaken over time, a process known as synaptic plasticity, which is essential for forming memories and adapting to new experiences. This ability to change is what makes our brains so powerful and flexible.