Long-term memory is our relatively enduring store of information, meaning that it outlasts the event that has occurred. It is the store of information that includes the facts, experiences and skills we have acquired over our lifetimes. In short, long-term memory ties together the past with the present, and its capacity is essentially unlimited. It lasts a very long time as well. There are also different varieties of long-term memory, including explicit and implicit. Explicit long-term memory, which is the intentional use of memory, is broken down into to subcategories. Episodic is knowing or remembering specific instances in one's life, and semantic is when one just knows certain information, but one does not remember learning it. Implicit long-term memory, what one may not know, is broken down into two subcategories as well. Procedural is our memory for how to do things, and an example is tying one's shoes or driving a car. Priming is our ability to identify a stimulus more easily or quickly after we have encountered similar stimuli.
A good example of long-term memory is the primacy effect. This is if one is given a list of words or letters to memorize, one would remember the first items on the list. This YouTube clip demonstrates the primacy effect.
One girl does several different motions with her arms, followed by another girl who attempts to imitate the first girl. She goes through the first 5 or 6 motions and then does not remember the rest. This is a good example of the primacy effect because the girl remembers the arm motions from the beginning, but she does not remember the second half. If she were to remember the second half better than the first half, then she would have demonstrated the recency effect, which is linked to short-term memory.