For the J=2, L and S are parallel and pointing in the same direction.
For the J=1, L and S are perpendicular to each other.
For the J=0, L and S are parallel and pointing in the opposite directions.
Because J = L+S,…,L-S. We see we get the highest value of J when L and S are both positive. But the physical meaning would be that if we have two angular momenta their sum would give the highest value when they both point in the same direction and cancel each other ( or partially cancel) when they’re pointing in opposite directions.