No mystery to it. Here is exactly what happens from the moment you call to the moment we hand the job back.
The site is walked to identify hazards, assess growth, and agree what gets cut and what does not. Anything you know is buried out there should be flagged now.
Stumps, wellheads, septic components, buried lines, survey markers and anything else to avoid should be physically marked, not merely described.
Deck height chosen for the growth and the goal. Cutting too low on rough ground scalps high spots and risks the machine; too high leaves stems that regrow quickly.
Open ground taken at speed, with heavy growth handled in successive passes at descending heights rather than forced in one.
Edges, around obstacles, and fence lines done last. Cut material is normally left in place to break down unless removal was agreed separately.
None of this is required — it just makes the visit quicker.