What is msg?

Msg

Monosodium glutamate, a seasoning made by fermenting starch that adds pure savory umami. Safe in normal amounts, whatever its old reputation says.

What it tastes like

Savory and brothy, making food taste meatier and more rounded. On its own it tastes like salty broth.

Chinese and Japanese cooking, fried chicken, snacks and seasoning salts, and more and more on chef menus that say it proudly.