Metacognition is the capacity to monitor, evaluate, and regulate your own mental processes. It encompasses two layers: metacognitive knowledge (what you know about how you think) and metacognitive regulation (how you control your thinking in real-time).
In school studies reviewed by de Boer et al. (2018), metacognitive strategy instruction improved academic performance by about g = 0.63 — larger than many traditional educational interventions. That is research on the approach, not a measured MindFrame result.
In practice, strong metacognition lets you catch errors before they compound, allocate mental effort where it matters, and update your beliefs when evidence demands it — the three things MindFrame practises with you.