Reshaping and stacking numPy arrays refers to changing the shape or size of an array or combining multiple arrays into a single array. NumPy provides several functions for reshaping and stacking arrays, such as:

• reshape(): Reshapes an array to a new shape;
• resize(): Resizes an array to a new shape, potentially adding or removing elements;
• vstack(): Stacks arrays vertically (row-wise) to create a single array;
• hstack(): Stacks arrays horizontally (column-wise) to create a single array;
• concatenate(): Concatenates arrays along a given axis;
• stack(): Stacks arrays along a new axis.