String Theory is a theoretical framework in physics that attempts to reconcile general relativity and quantum mechanics. It proposes that the fundamental building blocks of the universe are not point-like particles, but rather one-dimensional strings that vibrate at different frequencies, giving rise to various particles and forces.
This theory suggests that these strings exist in multiple dimensions beyond the familiar three-dimensional space. By doing so, String Theory aims to provide a comprehensive understanding of the fundamental forces of nature, including gravity, electromagnetism, and the strong and weak nuclear forces, potentially leading to a 'Theory of Everything'.