Question

What is displacement

Answer 1

"Displacement" is the straight-line distance, and its direction, from the starting point to the end point, no matter what route may have been taken along the way.

Answer 2

This is what wiki says hope it helps
A displacement is a vector whose length is the shortest distance from the initial to the final position of a point P.[1] It quantifies both the distance and direction of an imaginary motion along a straight line from the initial position to the final position of the point.

A displacement may be also described as a 'relative position': the final position of a point (Sf) relative to its initial position (Si), and a displacement vector can be mathematically defined as the difference between the final and initial position vectors: