Collision Detection in SOLIDWORKS is shown as a tool that helps identify where assembly components make contact as they move. It allows users to test collisions across the full assembly or limit checks to selected parts. When collisions occur, SOLIDWORKS can highlight the contacting faces and automatically stop dynamic dragging to pinpoint the issue. The video shows how contact may be intentional for checking alignment, or undesirable and likely to cause product failure if unnoticed. Users can update dimensions, observe changes in motion range, and make design adjustments before rechecking to ensure all collisions are resolved