Vibration testing is essential to assess how products and components respond to dynamic forces and vibrations in real-world conditions. It helps identify natural frequencies, which are inherent to structures and components and can lead to resonance-induced failures if not properly addressed. Modal testing and analysis, a part of vibration testing, provide insights into the mode shapes or vibrational patterns of objects, helping optimise designs for enhanced performance, safety, and reliability. In sum, vibration testing, with its focus on natural frequencies and mode shapes, is a critical quality control and safety assurance tool across various industries.