In recent years, biodegradable bags have emerged as a global phenomenon, replacing traditional plastic bags in supermarkets, restaurants, and households worldwide. This surge in popularity is not accidental but stems from the urgent need to address environmental crises, technological advancements in materials science, and shifting consumer preferences. To fully understand this trend, it is essential to examine three critical dimensions: the main types of biodegradable materials, their inherent advantages, and the wide range of items they can package.