Searching in the Help menu has always been a useful way to find things, but in Keyboard Maestro 8 it is a whole lot more useful. As well as searching all the menus, it will search the wiki and return matches there, so functions and tokens can such will all get direct help links.
Unfortunately, the help system only shows the first 20 or so entries, but you can still select the Show All Help Topics at the bottom to go directly to the wiki.
Don’t forget that holding down the option key while selecting from a menu will often get you help on the wiki for the selected item (trigger, action, functions, and tokens).