An isometric view shows a 3D object such that the three coordinate axes appear equally foreshortened, each axis 120 degrees apart on paper. Unlike a perspective drawing, parallel lines remain parallel. That keeps isometric drawings useful for measurement, not only visualisation.
Isometric is the workshop favourite for the 'pictorial' view because you can pick off approximate proportions directly from the drawing without doing any perspective trigonometry. It pairs naturally with three orthographic views (front, side, top) to make up a complete drawing pack.
CAD60 includes an isometric view in every drawing pack, automatically positioned and scaled to fit the A4 sheet.