Summary:

1. What is Zoom Poker
2. How I play (notes, HUD)
3. My HUD in details
4. Advice for HUD beginners

What's Zoom

Do you remember Rush Poker from Full Tilt? I used to play it, it was just for tournaments, if I remember correctly.
Zoom Poker by Pokerstars has the same fast folding feature, but I play only 6-max Texas Hold'em cash games (NL10). Fast folding means when you fold your hand, you jump in another random table, with new players and new hand, without waiting and watch the hand you're not into.

Compared to regular cash tables, at Zoom tables:

1. You don't get bored, even if you're tight or nitty. Some players tilt when they don't see enough good hands to play, some other players just get bored. It's difficult in Zoom, with no down times.
2. You can do a lot of hands per hour, without having to open a huge amount of tables, buying a large screen or a second monitor or a third eye.
3. If you sit-out for a couple of minutes you're back in action with 1 click, without losing seats at tables, without having to join waiting lists. You can go sit-out during session, without waiting for blinds, you get your position assigned statistically by the pool, so you don't lose blinds in the long term.
4. Sure, you can't choose tables with the right players and right seat, you just choose stake. Better have an HUD to know your opponents (see below).

I used to open 4 Zoom tables at once (NL2 and NL5), because of the fast folding it's like playing on ca. 8-12 regular tables regarding hands/hour, but you don't get crazy with 10 small windows and tiny numbers, and you can actually see the action going on.

Now I'm doing just 2 tables at NL10, because my winning rate is better with just 2 tables, I have more time to write notes and focus, however action is still fast so I use often the fold and watch button (regular fold) to take a breath when I get a difficult spot on the other table, or to watch big pots or strange moves from my opponents.

How I play

Very simple setup, it works for me also in small notebook screen.

When you fast fold, or when your hand is over, you always end up in a different table. Players are in a pool and they're mixed every new hand in new tables. Because of fast folding, someone thinks Zoom players are nitty. This is not true. You can find aggro nits, passive nits, regulars of all kinds, tilting guys, drunk people playing from smartphone app, some solid loose aggressive guys, maniacs, every kind of fish and good players you can think of.

For this reason, I think it's vital to play with HUD. I would be lost without it, I can't remember 100+ players names and playing styles!
For example, open-raising J8o from cutoff, right or wrong? I look at how much button calls and 3Bets pre-flop, how much blind fold vs steal and vs flop cbet, and then choose if situation is profitable to play.

Also taking notes is very important, as your HUD doesn't know everything. For example my HUD (PokerTracker) doesn't record timing tells, or crazy 100 big blinds preflop open-push (it happens, really!). I'm writing all kinds of strange plays in Pokerstars notes, using the replayer window - I could record player notes on PokerTracker notes as well, I'm just more comfortable.

I also use a simple Notepad to write down the last players I 3bet and 4bet preflop, and their reaction (fold, call, fold to cbet, raise, and so on). These are session notes, meaning I will delete the file when I stop playing. I find these useful because, for example, I'm 3betting a lot of players with high FoldTo3Bet stat, but I have to be careful not to bluff the same player too many times in a row, or he/she will adjust his play and rebluff me. It could be useful also to maximize value and to understand if opponent is 4betting because is upset at me (to much 3betting from me), or he really has a hand.

Another useful tool, that I use off the table, is the free software Equilab, to familiarize percentage ranges and so being able to understand HUD stats.

In this example I selected a range made by TT+, AK, A2s-A4s, T9s. That is 4.68%

My HUD explained

Note: HUD is recording hands of other players at your tables, even if you fast-fold. So we can build a big hands database without watching every pot. However, I always watch a big preflop pot if I see one, and take notes manually if players make strange moves.

If you click on the HUD you can have a large popup with lots of stats, but I slowly built the HUD with the stats I'm using most. There's a bit of "homemade" color coding, in general green means loose or fishy, red means aggressive, yellow means tight / nit, white or orange are kinda normal values. Let's zoom on my HUD:

All these numbers are percentages, except from (20k), which is the number of hands I have on the player - very important number to look at, you don't want to play based on inaccurate stats.

First row is for Pre-Flop:

VPIP / PFR / 3Bet / Fold to 3Bet / 4Bet ratio ( = 4Bets * PRF) / Fold to 4bet / Total hands on the player

VPIP is number of times they saw flop adding money preflop voluntarily (seeing a free flop from big blind doesn't go in this stat). That includes open-raise, limping, over-calling, and 3bets.

PFR the number of times raising: open-raise, 3Bet. So That's why a PRF close to VPIP (2/3 - 3/4 is solid) means more aggression preflop, is simple means less over-calling, less limping and more raising.

If I have a reasonable sample (let's say 1k hands) I can click on the HUD and read open-raising percentages from each position. Very useful.

This player looks way too tight and passive from 1k sample size.

3Bet is just a re-raise.
1% 3Bet means something like 18 combos, like AA-KK-QQ (QQ+). 8% means ca. 100-110 combos, for example like 99+, AQo+, AJs+ for value, and A5s-A2s, 76s-T9s as bluffs. Always look at notes to understand ranges: how much of that is for value and how much is bluff? Does he 3Bet small pairs like 55-77? Does he change range from in position to out of position?

Fold to 3Bet is very useful to choose what kind of hands I 3Bet vs him.
If his Fold to 3Bet is high, I will 3Bet a lot of bluffs like suited connectors (e.g. 76s) and suited blockers (e.g. A3s), or even total trash hands (e.g. Q4o).If it's really high I might choose to just call and trap with premium hands, especially if he got high continuation bet at flop.
If he has very low Fold to 3Bet I will not raise bluffs (unless they have very high Fold to Flop Cbet in 3Bet+ Pots), but I will consider raising for value hands like AJ, AQ, TT, maybe even KQ or 99, especially in position, and of course premium hands like QQ+ and AK.

4bet ratio is just a re-re-raise range.
Usually a 4bet is 20-25bb or more, sometimes they push 100+ big blinds with the most various and strange ranges; notes are useful in this. Don't trust 4bet ratio unless you have huge sample size; trust notes more. 4Bet ratio of 2% could mean QQ+ and a couple of bluffs like A2s and A5s, or a range like AA, KK and sometimes AK. Instead, 4% or more means some bluffing, or overplaying hands like JJ and AQ.
I look at 4bet ratio mostly to see if it's too high, not to have the exact range.

Fold to 4bet is useful to exploit players with high 3Bet.
There are lots of players with 10% 3Bet or more, but 75% Fold4bet or more. That means nice opportunity to win the pot preflop, without a premium hand. If the player 3Bets a lot but doesn't fold to 4bets, I narrow my opening range a little and 4bet for value only, no bluffs. That could include a 4bet push of 100 big blinds, depending on notes - is he a crazy preflop gambler calling 100bb with 99 or AQ? Does he want to always see the flop?

Second row is for Flop only:

Continuation Bet / Fold to CBet / DonkBet / Float / CBet in 3Bet+ Pots / FCBet in 3Bet+ / DonkBet in 3Bet+ / Float in 3Bet+

<

A Cbet is when you bet (the Flop in this case) after open-raising Pre-Flop. People makes a pair on the flop 1/3 of the times on average, but read this together with PFR, position and board texture to guess if they're cbetting too much of too little.

Fold to Cbet is usually around 40% - 45%. If it's high like 65%+, I will cbet more flops with air. If it's 30% I will cbet more for value, but even if the Fold to Cbet is super-low it's always good to bluff cbet very dry boards (like A72 rainbow or K55).

By DonkBet I mean when the player is not the open raiser, he's out of position, and he bets into your pot. This player is doing that only 3% of times: better believe he has something. Checking HUD notes and manual notes you can see better what range he donks (for example sets and two-pairs on wet board, or strong draws, or simply top pair).

The Float in PokerTracker is the bet vs missed cbet of Holdem Manager. We raise preflop, we check flop and our opponent bets in position 48% of the times. Nice to know... when this Float is high, let's say 70%, you can do all sorts of tricky play, like check raise them with strong hands and bluffs, for example, or check-calling and trapping 'em.

Third row, Turn only:

Continuation Bet / Fold to CBet / DonkBet / Float / Probe / CBet in 3Bet+ Flops / FCBet in 3Bet+ / DonkBet in 3Bet+ / Float in 3Bet+ / Probe in 3Bet+

Fold to Turn Cbet is useful for planning a double-barrel bluff. The perfect double-barrel victim is a player who has low Fold to Flop Cbet and high Fold to Turn Cbet.

Float Turn is what people usually calls "floating". The act of calling flop cbet in position, planning to bet after a check on the turn, smelling weakness. Of course they could have a real hand and betting for value, but if Float Turn is like 80%, we know we're facing a floating maniac.

Probe in PokerTracker is when they are out of position, they bet into you AND you checked the previous street as open-raiser. Kinda out of position floating.
Example: we open-raise pre-flop. Flop he checks to you, and you check behind. Turn he bets: this is probe. Again, high values are useful to know, you can exploit aggressive players if you can check flops behind, giving them a free card (the Turn).

Fourth row (mixed)

Name of the player / Steal / Fold to Steal / 3Bet VS Steal / Aggression Factor / River Bets / Float River in 3Bet+ / Probe River in 3Bet+

Steal how much he open-raises from Cutoff, Button and Small Blind.

Fold to Steal and 3Bet VS Steal are reactions from blinds. Some player 3Bet is low in general, but high vs steal, so that's why I have a distinct stat for that.

Aggression Factor is the value I'm using since less time... I look at it when in doubt, instead of flipping a coin :D You can find the formula on the web, however aggression is not calling, it's betting or raising. I consider passive playing 0 < AF < 1.5, instead AF > 3 is pretty aggressive (in my experience at 6-max, but feel free correct me). Note that a passive play is not always a weak play, for example if the pool is full of aggressive maniacs.

River Bet is a very general, well, bet on the river. Usually I don't have so many hands on player to have useful values for RiverCBet or RiverFloat and so on, so I just look at the total bets on the river. If it's over 50% (over a reasonable sample) I usually exploit my opponents check-calling rivers on missed draws, or calling them more in position.

River Float & Probe are only useful after a lots of hands. In doubt you can mouse hover on the stats and the HUD will display a value like 3/5; it means the HUD saw him doing 3 times that kind of bet out of 5. For a few hands, don't look, or take notes (e.g. in OOP 3bet F very wet board, bet-call, T check-check, scary at the R, he bets POT) and read them with all the others info you have, as simple as VPIP / PRF. Never trust river stats more than simple preflop and flop stats (unless you have huge sample) when trying to frame / categorize the player (crazy, passive, etc).

Too many stats?

When you start using HUD, I suggest starting having just VPIP, PRF, 3Bet and number of hands of opponents. When you master these, add some Flop stats like CBet and FoldToCbet. Then add some more, slowly.

Remember to trust stats only if you got reasonable sample. You can watch sample size (number of hands) or mouse hover on the specific stat to get the exact amount of times the HUD saw that move:

We have 460 hands on him, he Cbets Flop 32%, 'cause we see doing that 10 times out of 31.
That value might change after another 500 hands, and be more accurate.

How to use the HUD at Zoom microstakes

Just f*cking exploit them : )
Really. I'm not good player, I have a lot to improve, but there's no money to be made by playing balanced. Unless they're good regulars, they will not remember your playing style the day after. Many of these players don't have a HUD. If you don't have hands or info on player, play ABC poker. Otherwise, exploit exploit exploit.

Feel free to ask me, correct me or to give suggestions!