Mesh editing is a process used in 3D modeling to modify the structure of a mesh, which is a collection of vertices, edges, and faces that define a 3D object. This technique allows artists and designers to manipulate the shape and appearance of models, making it essential in fields like animation, video games, and virtual reality. Tools for mesh editing include software like Blender, Maya, and 3ds Max, which provide various functions such as scaling, rotating, and deforming the mesh. These tools enable users to create detailed and complex shapes, enhancing the visual quality of digital content.