The "Help" menu item is a major lifesaver and especially in complex apps (that is, those which actually take advantage of macOS' native menus, which sadly isn't a given nowadays).
For example Photoshop (and its colleagues) is darn near impossible for me to use on Windows — and at least 50% of the reason is absence of the "Help" menu search feature.
Damn, been using macOS for 9 years now and just found out about this :o Thanks!