Managing an airway, whether it is via intubation or some other type of non-invasive method, is essential to keeping someone alive. It is the first letter in the mnemonic we learn - "A, B, Cs" and without the skill to manage an airway someone can significantly decline.
FCCS Ch. 2
Pulmcast Airway Track (you are responsible for everything listed below)
Airway Preparation: Plan
Airway Assessment: Difficult Predictors
EmCrit: LAMW: Intubating the Hypotensive Patient