This paper aims to elucidate recent advancements in fiber-optic sensors across different domains, specifically in health, smart home, and smart industry. It particularly emphasizes their integration with various technologies such as machine learning (ML) and the Internet of. If 5G is the neural conduction of the digital age and AI the super brain, fiber sensing serves as the quietly growing peripheral nerves. These advantages are essentially related to the optical fiber properties, i., small, lightweight, resistant to high temperatures. Fiber optic sensors utilize optical fibers to measure various physical and chemical properties such as temperature, pressure, strain, and even the presence of specific substances.