Difference between the component (top) and the bottom side view?

What is the difference between the component (top) side show/view and the bottom side view?

The component side show or the component side view is a top side view (view thought the component).The bottom side view is the view from the bottom side of the component. Basically bottom side view is mirrored top side view.

What view should you use while drawing the footprint (land pattern) for the PCB layout of the electronic’s parts?

When you draw the PCB layout (footprint), you should draw the component side view. For details, see picture 1.

Picture 1. Difference between the top (component) and the bottom side shows/views.