Metaknowledge is knowledge about knowledge […] The hallmark of metaknowledge is its being a matter of knowing propositions in which one K[nowledge]-operator occurs within the scope of another. Knowledge about someone's ignorance thus counts as metaknowledge.
Source: wiktionary
The acts of monitoring, hypothesizing, and verifying are internal work which require a person's metaknowledge or knowledge concerning what kind of knowledge is needed and how that knowledge is appropriately used in the situation.
Source: wiktionary
Meta-knowledge is knowledge about how to acquire and exploit information, rather than basic knowledge about the world.
Source: wiktionary