Abstract : Probiotics are helpful living bacteria that have been shown to provide health benefits for humans and other animals. primarily used to maintain a healthy balance of microorganisms in the gut, which has beneficial consequences on the host organism, including promoting development and health. Most often, Bifidobacterium and Lactobacillus strains are what people take for the health benefits of these bacteria. Reduced lactose intolerance symptoms, gut microbiota modulation, and enhanced digestion are just a few of the ways in which probiotics have shown promise as treatment choices for a range of conditions, including antibiotic-associated diarrhea, inflammatory bowel disease (IBD) and atopic dermatitis. Probiotics have antagonistic effects on a wide variety of microorganisms through a number of mechanisms, including modulation of the gut flora, adherence to the mucosa and epithelium, fortifying of the gut epithelial barrier, and modification of the immunity to provide an choices to the host. There has been a rising demand for foods containing probiotics in recent years. In this article, we will discuss the evolution of probiotics, their mechanisms of action, their health advantages, and the disorders they may treat, as well as their applications in the health and food industries.