Trailhead IT is an invented IT services firm. A business like this maps neatly onto the five pillars: find prospects, nurture them, close, deploy what was sold, then keep the customer through regular reviews.
Front of the funnel
Prospecting scripts are Lead Acquisition work, and the engagement journey that warms a prospect up is Lead Nurture. With both written down, a new rep can read the path a prospect takes before making a first call.
Closing, delivering and keeping customers
Product knowledge supports reps when they close. Post-close deployment covers delivering what was sold, and quarterly business reviews are how customers are kept. Because the pillars follow the customer, anyone can see what happens before and after their part.