>>21471589 (OP)Alongside, salt enhances all flavours, MSG primarily enhances savoury flavours. Try it on an unseasoned omelette or something neutral to understand what it does. A good strategy if you want to try it in a dish is instead of 100% salt, use e.g. 80% salt and 20% MSG.
Also, another key difference, the timing is different. With salt you want to add it as soon as possible in the cooking process, with MSG you want to add it late. You can add heat to it, but don't put MSG in at the beginning of a stew or something because it won't do much.