What is memory?

We used this term many more time and hardly we know the actual meaning of this word. First of all we are looking upon the dictionary meaning of this word
Memory is the faculty of the brain by which information is encoded, stored, and retrieved when needed. Memory is vital to experiences, it is the retention of information over time for the purpose of influencing future action. 
Let me explain all of these line in simpler words memory is something which helps to recall the name of that person which is standing front of you waving his/her hand on you and your mind is buffering.Memory is the part and important work of the brain . Memory command our brain to encode store and retrieve information these are three basic steps and these three steps changes one individual from another individual . There are basically three types of memory
. sensory memory
.short term memory
.long term memory
Sensory memory as the name indicates memory which activates when we sense something, it is the memory which stores the information for microseconds
Then the short term memory it is the memory which stores information for shorter duration few seconds to 1/2 minute if we link the information with our previous knowledge about that specific information then we proceed to long term memory . In long term we stores information for longer duration with the help of continues rehearsal and practice.
Part of brain involved?
Now we looked upon different part of brain which are very to have , to live in such hustle and bustle of the world.
.Amygdala
The main job of the amygdala is to regulate emotions, such as fear and aggression  for more deeper understanding do visit
http://openstaxcollege.org/l/mousebeam
. Hippocampus
Researches found that hippocampus involved in specifically normal recognition memory as well as spatial memory it also helps in transferring the information to long term memory that is know as consolidation.
. Cerebellum and prefrontal cortex
. Neurotransmitter
neurotransmitters involved with the process of memory, such as epinephrine, dopamine, serotonin, glutamate, and acetylcholine.
It is also believed that strong emotions trigger the formation of strong memories, and weaker emotional experiences form weaker memories; this is called arousal theory.
So it is about memory if you have any  suggestions or queries you can contact me