What is it?

Also why isn't it explained in the main item guide here: https://ladderslasher.d2jsp.org/index.php?g=15

it's a map stat and I don't think those are explained in that link but it would be cool if they were.

As far as I know stealth simply gives you a higher chance at being able to attack the monsters first every time they spawn.

is it this or is it gives you a chance to not spawn mobs on every step in a map?

i always thought it was like possibility of going more than 1 step before spawning more mobs

Its giving you a chance for the monster not attacking before you do

Hmm okay well that’s stupid, who gives a shit about that 🤦🏻‍♂️🤣

Can result in less shrining, Regening, etc. Mostly good with 2 or 3 wave spawns.

It's not game changing, but still a small benefit

that's actually really good if u ask me, imagine having high ep/mon dif/ + stealth

let's say that there's 20% stealth, technically 1 out of 5 mobs wont attack u until u have attacked it (triggered it)
So if you're lucky soloing etc finding a 3wave ep that (might) be rippy etc, and only 1 of them attack u because of the stealth
so u can sit there and attack one by one without them attacking u (until u trigger them, once again)

So what andy said is nice, means u take less hits taken etc which ofc results in either less healing/shringing/regening

That is actually one of my favourite stats on a map (other than the ones that effect loots ofc)

Is that actually how it works? If so that mod seems nice. I assumed it would trigger all mobs to hit you as soon as you made an action. But it’s individually per monster? So you could wait a second and see which one(s) are attacking you and keep the other mobs non aggressive while you kill the one(s) that are aggressive?

That’s actually really nice

New Map Mod added: Stealth % -- Gives % chance to surprise monsters and get first attack(s).

If you search the changelog for stealth you will find it