The term metamemory refers to knowledge of memory and memory process. It is knowing, for example, what one’s memory limits are, which memory strategies are more or less effective, and which memory tasks are more or less difficult.
Memory also includes being able to plan and control memory process consciously as one in learning and remembering.
Metamemory is part of metacognition, knowledge the human mind and of the whole range of cognitive processes.
The store of metacognitive knowledge might include an understanding that you are better at word problems than at math problems, that it is harder to pay attention to what are trying to learn when there is distracting noise in the background than when it is quiet, and that it is wise to check out a proposed solution to a problem before concluding it is correct.
What is metamemory?