Symmetry-protected topological (SPT) states are phases of matter that possess non-trivial topological properties, protected by the presence of certain symmetries, and unlike traditional topological insulators, they become indistinguishable from a trivial state when these symmetries are broken. These states have garnered significant interest due to their robust edge states that could be utilized in quantum computing and other technologies that require stable quantum properties, immune to localized perturbations.