The glyph system in Legion is changing in several ways. First, there are no more major glyphs, only cosmetic minor glyphs. Second, glyphs are now applied to the affected ability directly and are consumable. You can no longer permanently learn a glyph. For example, when you right-click one of the Dire Beast glyphs it will open up your spellbook and highlight Dire Beast, which you then click to apply.
Hunters have a few cool glyphs and a few that could still use some work. I’ll explain them all below, but you can also watch this video to see them in action.