Low-energy nuclear structure is a research field within nuclear physics dedicated to investigating the intrinsic properties and behaviors of atomic nuclei at excitation energies below particle separation thresholds or relativistic regimes. This academic concept focuses on understanding the static and dynamic organization of nucleons (protons and neutrons) within the nucleus, examining characteristics such as energy level schemes, spins, parities, electromagnetic moments, nuclear shapes, and modes of radioactive decay to elucidate the nature of the nuclear force and the quantum many-body problem. Its study is fundamental to understanding nuclear stability, nucleosynthesis in stars, and applications in nuclear energy and medicine.