The difference between a verbal commitment (non-binding) and the National Letter of Intent (binding contract for athletic scholarship).
Both terms get thrown around as if they mean the same thing. They don't. One is a handshake; the other is a contract.
An informal agreement between an athlete and a college coach. The athlete says "I'm committing to your program." The coach says "We'll offer you a scholarship when you're eligible to sign." Neither side has signed anything; nothing is legally binding.
Verbal commits can happen as early as sophomore year (or earlier in baseball and basketball, where 8th-grade verbal commits exist). They are publicly announced — "Player X verbally commits to University Y" — and most athletes follow through, but the commitment can be broken by either side without penalty.
Things to know about verbal commits:
A formal, binding contract. Signed during designated NLI signing periods (typically November and April for most sports), the NLI commits both sides:
Breaking an NLI has real consequences. Athletes who back out can face a one-year residency requirement at any other NCAA school (losing a year of eligibility) and lose the original scholarship. The school can also release you from the NLI if circumstances warrant, but that's a negotiation.
The riskiest period is between verbal and NLI. A coach can pull the offer if a higher-rated recruit becomes available, the program's roster needs shift, or the staff itself turns over. Keep your options warm until you've signed the NLI — don't shut down other coaches' interest entirely just because you verbal'd.