Monosodium glutamate is primarily used as a flavor enhancer in the food industry and culinary arts... here is what it is typically used for:
Enhancing umami; meaning it adds a deep savory, or meaty flavor to dishes
commercial food processing;because this is a large 25kg industrial bag, it is typically used by restaurants food processing plants or manufacturing facilities to flavor processed foods like chips, snack mixes, canned soups, frozen dinners and instant noodles.
Seasoning:it is widely used in cooking particularly in Asian cuisines to balance the round up flavors in soups, stews,gravies, marinades, and sauces...
Essentially, it acts similarly to salt, but instead of making food taste Saltier, it enhances the savory richness of the ingredients already present.