In lang=en terms the difference between target and approach
is that
target is to aim something, especially a weapon, at (a target) while
approach is to come near to in place, time, character or value; to draw nearer to.
In figuratively|lang=en terms the difference between target and approach
is that
target is (figuratively) to aim for as an audience or demographic while
approach is (figuratively) to draw near, in a figurative sense; to make advances; to approximate.
As nouns the difference between target and approach
is that
target is a butt or mark to shoot at, as for practice, or to test the accuracy of a firearm, or the force of a projectile while
approach is the act of drawing near; a coming or advancing near.
As verbs the difference between target and approach
is that
target is to aim something, especially a weapon, at (a target) while
approach is to come or go near, in place or time; to draw nigh; to advance nearer.