The Order Saccharomycetales is a group of fungi commonly known as true yeasts, belonging to the phylum Ascomycota. These unicellular fungi are widely used in fermentation processes, including baking, brewing, and winemaking, due to their ability to convert sugars into alcohol and carbon dioxide. Members reproduce primarily by budding or fission, and some can form pseudohyphae under certain conditions. Saccharomycetales are found in diverse environments, from soil and plant surfaces to animal microbiomes, and include important species such as Saccharomyces cerevisiae, which serves as a key model organism in genetics and molecular biology research. Their ecological and industrial significance makes them one of the most studied fungal orders.