A healing spell displays a large number, but the target was barely injured. That difference matters when you compare abilities or review a boss attempt. Potential healing and health actually restored are not always the same amount.
Use a deliberately simple model
Imagine a fictional game with a maximum health of 1,000. A character currently has 850 health and receives a 400-point heal. If the game caps health at the maximum and has no other effects, only 150 health is restored. The remaining 250 is overhealing.
These invented values illustrate the arithmetic; they do not describe a particular game or patch. Some games convert excess healing into a shield or trigger another effect. In those systems, the unused health restoration may still have a separate benefit.
Read what the log actually counts
Check whether a healing total includes overhealing, absorbs, self-healing or effects from equipment. Compare the same time window and the same type of output. A high total from a long encounter is not directly comparable with a shorter attempt.
Timing also matters. A smaller heal that arrives before the next hit may prevent a death, while a larger one cast afterwards cannot undo it. Conversely, anticipating damage may be sensible even if some casts restore little health. One metric cannot judge every tactical decision.
For a practice review, choose one dangerous phase and note the target’s missing health, the cast timing and what happened next. Keep other variables stable where the game permits it. Do not blame another player from a summary number that omits the situation.
The useful question is “What did this action contribute at that moment?” rather than “Who produced the largest number?” Understanding overhealing helps answer it, provided you first check the mechanics and reporting rules of the game you are actually playing.