Metacognition refers to the awareness and regulation of one’s own thought processes. It involves thinking about thinking and includes skills such as self-reflection, self-monitoring, and self-regulation. When applied to post-traumatic stress disorder (PTSD), metacognition plays a significant role in how individuals process and cope with traumatic experiences. The results of experimental studies proved that metacognitive therapy (MCT) is effective in treating PTSD. MCT for PTSD offers several key benefits, making it a highly effective and client-friendly treatment option. By directly targeting dysfunctional metacognitive beliefs, MCT empowers clients to gain control over their thoughts and emotions, leading to rapid and sustained symptom reduction. Some studies specifically target chronic or complex PTSD, often resulting from prolonged or repeated trauma, such as childhood abuse or combat. Others focus on more specific types of trauma, like road traffic accidents or physical assaults. The studies generally aim to assess how well MCT works across different trauma types, offering insights into its versatility and effectiveness as a treatment approach. Additionally, MCT’s potentially lower dropout rates make it a more sustainable treatment option for clients, especially those who may find other therapies overwhelming or too intense.