How do jungle resets work?

umm depends who your jungling with, different jungles start and function differently. for example farm junglers you wanna gank a little later where with someone like lee sin, early ganks dominate. so who do you jungle with

If you're talking about when camps reset and regen health, this happens when they are either pulled too far from where they spawn, or if they lose vision on their target while not recently taking damage, or if they lose vision on their target too many times (which prevents certain ranged champs from clearing while taking almost no damage).

You don't want to reset camps. That means you've walked out of their aggro range and they'll run back to their starting area and recover health.

If you are talking about soft resets is when a Monster (after being agro) loses his agro and tri to goes back to camp (but not quite gets there and thus it doesn't gain health) it is somehow useful with champions that has somewhat of gap closer or are CD reliant as it reduces the damage taken. A soft reset can only happens 5 times before it becomes a hard reset

Hard reset are like soft resets but the monster reached their spawning point or it was the 6th health reset. Then He would precced to gain HP until he were full HP if he were to be left alone.

Animation resets are commands executed right after an AA so the rewind animation doesn't take place and you end up attacking a tad faster. Vi and Sejuani are the 2 junglers I know that highly benefits from this treat. Is not hard to get but out of the 3 resets is the one that you need more practice.