This document defines human memory and its key components. It discusses that memory involves encoding, storing, and retrieving information through different types: sensory memory holds information briefly, short-term memory for a few seconds to minutes, and long-term memory for hours to years. The memory processes of encoding, storage, and retrieval are also explained. Three important factors that affect memory retention are attention during learning, the emotional impact of experiences, and tailoring learning to an individual's preferred learning style.