The first type of memory is sensory. Sensory memory is the shortest type of memory and usually disappears quite quickly. It is the memory of a stimulus caused by any of the five senses. As mentioned by Luke Mastin, sensory memory for visual stimuli is often referred to as iconic memory, auditory or olfactory memory is referred to as echoic memory, and tactile memory is referred to as tactile memory. Echoic memory, being perhaps even more closely linked to memory than the other senses, is due to the olfactory bulb and olfactory cortex, where olfactory sensations are processed. They are very close, separated by only 2 or 3 synapses. Which are involved in memory processes. Therefore, the olfactory stimulus could be faster and strongly linked to the memories and emotions associated with them. The memory of a smell can last longer, even without constant contact. (Luke Mastin)The second type of memory is short-term. Short-term memory allows you to remember things, but only for a few seconds or a minute or so. It allows you to remember what you just read or a phone number you just received from a friend. It allows you to remember what just happened instead of storing information that isn't that important in your long-term memory. But if it's information you want to keep in long-term memory, then short-term memory is important. Information degrades relatively quickly unless you try to make the effort to preserve it further. This brings you closer to long-term memory of the information or experience. In this process it is best to review the information more than once to ensure it is stored for later memory use. That's why it's best to take a look at a chapter you're... halfway through the paper... you're in class and the teacher asks you a question. You know you know the answer, but you can't think it. It's on the "tip of your tongue." Then the teacher says part of the answer or something related to it and it hits you. This is because the suggestion or cue puts you on the right track and therefore your mind remembers the information more easily. Serial recall occurs when you recall information in order. How to remember the number line or the alphabet. Now that we've looked, we know. Even though we don't have all the information yet, we are starting to understand how our memory works. We understand how short our sensory memory is, how our mind develops memories and how we remember them. This information is crucial for further understanding memory formation. From sensory to long-term memory we understand now, better than ever, the formation of our memory.