Quantum fluids are unique states of matter that exhibit quantum mechanical properties on a macroscopic scale. They include substances like superfluid helium and Bose-Einstein condensates, which can flow without viscosity, allowing them to move through narrow channels without losing energy. This behavior arises from the collective quantum effects of particles at extremely low temperatures. In quantum fluids, particles behave as waves, leading to phenomena such as quantum vortices and coherence. These fluids challenge our classical understanding of physics, revealing new insights into the behavior of matter at the quantum level. Their study has implications for fields like condensed matter physics and quantum computing.