What is the difference between high poly and low poly?

usually we use lowpoly for games, and hipoly for cinema, but long-time ago most of3d artists are using normal mapping techniques and subdivision techniques to get both lowpoly-hipoly same time

The high poly method is3d models consisting of high number of polygons.

The low poly method is3d models consisting of low number of polygons.

The difference between both methods is the end result approach.

Hi-Poly means a high polygonal count on your3D model, while Low Poly the opposite. Each has its value and time. High Poly gives you more details to play with but renders slowly, therefore it is used in Films where we have enough time to render. While low poly is needed in games for example to establish a high enough frame rate for real time rendering of the3D models. Of course we can generate hi-poly looking models by baking textures...etc.