What's the difference between a verbal warning, a technical warning and a technical foul?

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Penalty Used for Effect Verbal warning Minor unsportsmanlike behavior; only one per side per match Non-punitive caution Technical warning Minor unsportsmanlike behavior: objectionable language at a person, any audible or visible profanity, aggressive arguing, ball abuse that doesn't endanger anyone, delay of game, excessive line-call appeals, unauthorized coaching (Rule 22.B) No point lost, no server change (22.C) Technical foul Extreme behavior: reckless paddle or ball abuse that puts someone at risk, extremely objectionable language, threats, or a second technical warning (Rule 22.D) One point deducted from the offender, or one point added to the opponent if the offender has 0; no server change (22.E) Don't stop play to assess a penalty; apply it after the rally, with a brief explanation (Rules 22.A.1, 22.C, 22.E). After a point adjustment, the affected side moves to the correct positions for its new score. A deduction that produces a game-winning score applies regardless of who was serving. You can penalize any time the players are in the vicinity of the court, including before the match (Rule 22.A).

Penalty	Used for	Effect
Verbal warning	Minor unsportsmanlike behavior; only one per side per match	Non-punitive caution
Technical warning	Minor unsportsmanlike behavior: objectionable language at a person, any audible or visible profanity, aggressive arguing, ball abuse that doesn't endanger anyone, delay of game, excessive line-call appeals, unauthorized coaching (Rule 22.B)	No point lost, no server change (22.C)
Technical foul	Extreme behavior: reckless paddle or ball abuse that puts someone at risk, extremely objectionable language, threats, or a second technical warning (Rule 22.D)	One point deducted from the offender, or one point added to the opponent if the offender has 0; no server change (22.E)