So, mat is similar to **mat, this is just a way, address arithmetic works. And both of them are addresses, both of them are pointing to this location, both of them mean the content of this location.
mat आणि **mat हेच सारखेच , हे दोन्ही पत्ते सारख्याच स्थानाकडे ला निर्देश करतात तसेच * = mat हे सुद्धा सारख्याच स्थानाकडे ला निर्देश करतात.