I am studying electromagnetism but there is a concept that can not lead to the interpretation and it's Laplace operator o laplacian.

I know the meaning of divergence for example, it's the flux of an scalar field in closed surface. The meaning of rotational is that, it's the circulation of the vector through a closed path where the direction of the rotational vector is the center of rotation. And finally the gradient is the rate of change of the scalar field whose direction is such that points in the direction of maximum variation.

So, when I see these operators I can bring to a performance and understand the concepts of the fields. But I do not know what physical interpretation gives to the Laplacian