Shining and beautiful nail gradient styles refer to nail art designs that feature a smooth transition of colors, often with a glossy finish. These styles are popular due to their eye-catching appearance and ability to complement various nail shapes and lengths. Gradient nail art can be created using a variety of techniques, including sponge application, brush strokes, and foil wrapping. The colors typically chosen are vibrant and bright, emphasizing the 'shining and beautiful' aspect of the design.