Bacterial cellulose (BC) has emerged as a versatile biomaterial due to its unique properties, including high purity, biocompatibility, and exceptional mechanical strength. The fabrication of functionalized BC through fermentation can enhance its physical and chemical properties, making it suitable for a wide range of applications. In medicine, BC is used in wound dressings, tissue engineering scaffolds, and surgical meshes due to its biocompatibility and ability to promote tissue regeneration. In biotechnology, BC serves as a substrate for microbial growth and plays a role in biosensor development. Its adaptability extends to cosmetology, where it is employed in facial masks for its hydrating and soothing effects. In the food industry, BC is utilized as a texturizing agent and fat replacer. Environmental applications include its use in filters, adsorbents, and membranes for water purification and pollution control. Additionally, BC’s biodegradability makes it an attractive option for sustainable development. The commercialization of BC-based products has significantly expanded, with innovations emerging across various industries, highlighting its potential as a transformative material in both traditional and novel applications.