The Limbic system is a part of the brain that is mainly responsible for emotions, motivation, and memory. It is not just one structure but a group of different parts of the brain that work together.
Some important parts of the limbic system are the Amygdala, Hippocampus, and Hypothalamus.
The amygdala helps in processing emotions like fear, anger, and pleasure. The hippocampus is important for forming memories and learning new information. The hypothalamus helps control body functions such as hunger, thirst, and body temperature.
Because of the limbic system, our brain can connect emotions with memories and behavior. For example, emotional experiences are often remembered more strongly than normal events.
Understanding the limbic system is important in medicine and psychology because problems in this system can be related to conditions like anxiety, stress, and depression.
But one interesting question is: If the limbic system controls emotions and motivation, how much does it influence the decisions we make every day? 
MBH/PS