What is the physical meaning of the shape of an electron cloud? What shape do s-orbitals and p-orbitals have?

What is the physical meaning of the shape of an electron cloud? What shape do s-orbitals and p-orbitals have? Do the 2s and 3s orbitals have the same shape?

The shape of the orbital determines the region of space around the nucleus in which the presence of the electron is most likely the s-orbital has a spherical shape, the p-orbital has the shape of a dumbbell.
The 2s and 3s orbitads have the same shape.

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