Tidal energy is a research field and engineering discipline dedicated to understanding, developing, and implementing technologies that convert the kinetic and potential energy of oceanic tides into usable forms, primarily electricity. This academic concept encompasses the study of tidal hydrodynamics, the design and optimization of various energy conversion systems (such as tidal stream turbines, tidal barrages, and dynamic tidal power systems), and the assessment of their environmental impacts, economic viability, and integration into energy grids. Its significance lies in harnessing a predictable, high-density, and renewable energy resource with the potential to contribute substantially to sustainable global energy portfolios and enhance energy security.