Dragon Glyphs are needed to unlock Dragonriding talents in Dragonflight. You can unlock all 40 while leveling in just 20 minutes, thanks to this handy video guide.
Dragonriding talents empower your drake, ultimately allowing you to stay longer in the air. However to unlock the perks, you must gather so called Dragon Glyphs. The yellow-tinted objects are scattered across the Dragon Isles and you must fly through them to earn them.
Leveling becomes a lot easier and fun with a maxed out dragon. The author claims you can gather all Dragon Glyphs at level 60-61 in about 20 minutes with Dragonriding unlocked.
Below is a video guide by Graymist.