Enough to be the informed person in the meeting, without a law degree.
The O-1 is a nonimmigrant status for people with extraordinary ability, evidenced by awards, publications, press, judging, critical roles and similar public records. It has no annual cap and no lottery, files year-round, and premium processing returns decisions in 15 calendar days. A U.S. agent may act as petitioner for a person with multiple engagements — which is why your company never files.
Form I-129, USCIS fees, LCAs, prevailing wages, petition amendments. Those live on the agent side. Bookmark the leadership one-pager for the person who asks "what are we committing to?" — the answer fits on it.
A one-screen orientation for HR: what the O-1 is, what the employer touches, and the three artifacts worth bookmarking.
