Your brain works as a storage area that stores memory. There are actually two types of memory, short-term and long-term. In your brain, there are various kinds of memory that are stored. Since the brain is so enormous, it requires a system where the memory can be encoded and retrieved.

Your brain is required to get information very quickly, regardless of what it is. It doesn't matter whether the information is old or new. There are some times where the brain cannot retrieve the memory that is needed. Depending on the situation, it could be something that is not a big deal. On the other hand, it could be something that is massive.