Recently my teacher taught me about Energy density(Energy per unit volume) and told us the formula for the same.
This was explained by taking "Energy" as Energy of a parallel plate Capacitor and dividing it by the volume contained within the capacitor.
And after this I was explained to integrate the Energy Density times volume over a region to get the energy contained in that region.
Now I understand that separating two attracting charges requires energy, which is stored as the potential energy of the "capacitor plates".
But when assigned to a non material object, like energy in a "region" I can't understand what it means at all, nor can I form any intuition regarding this.
Please help me out if you know what this means.