It has barely any flavor at all. And it is not all that noticeable as a flavor profile, it has the tendency to punch up the salt character of some foods.
Almost all pre-made sauces served or used as bases in restaurants use MSG or some other form of Glutamate, that does not have to be labelled as such. They are also allowed to not list it, if it is less than 5% of the ingredients, it can even be listed as a spice or flavoring.
Whip It Off, Chambers!
"perhaps...but then again...maybe not..."