Does it affect a lot if you are in the big blind, small blind, after the big blind, two after the big blind? how does it affect? Talk to me a little, please thanks
Position matters a great deal, as does the amount you already commited to the pot.
There is out of position (OOP), the Small Blind is always guaranteed to be first to act on all postflop betting rounds, so they are 'furthest out of position', the closer to the button the less out of position and the more in position you are. So from most to least OOP in a 8 9 handed game are SB (small blind), BB (big blind), UTG (under the gun), UTG1 (under the gun + 1), UTG2 (under the gun + 2) , LJ (low jack), HJ (hijack), CO (cut off), BTN (button).
There is 'In Position' (IP) - in which case you are the last person to act and thus have an information advantage, and if everyone checks before you can decide to check behind which garuntees you to see the next round. The BTN is IP on all post-flop betting rounds, which is a major advantage. However if the BTN folds, then the next player closest to the BTN is in position.
There is another way to be in position which is 'relatively in position' - for instance if there is someone who always bets, and you are the person to act immediately before them - then you are relatively in position - because you are last to act after they bet,
The SB and BB already have 1/2 and 1 big blind invested. So even though they have the worst position - they can play a larger percentage of hands due to their excellent preflop
pot odds. For instance in a single raised pot with a raise size of 2.5 blinds, the big blind has to pay 1.5 blinds, and thus needs (1.5/(1.5+1.5+2.5) = 27.3%
equity to call. And if there is an ante even less equity to call. 72o has 30.23% equity against a 60% of hands openning range for the BTN. So the BB has enough equity to play any two cards.
However the BB should adjust their calling range for 'realizable equity' (If 72o hits a 2 or 7 on the flop, it will likely to fold if the BTN bets the flop and turn, thus even though it might have the best hand it has difficulty 'realizing' that equity, whereas AK can call a flop and turn bet, and thus is likely to realize its equity)
The BB also has the advantage preflop that if only one other player is in the pot, his call closes the betting round and he gets to see the flop. Any other position has to worry about the BB or other players raising the pot.
.Other positions the 'first after the button' is called 'under the gun' (UTG) have bad position and they don't have any money invested yet - so they play an extremely 'tight' range, depending on how many players are to act after them. In a 9 player game, UTG might play 5-13% of hands.
The player after the UTG player is sometimes called UTG+1 (or UTG1) in 9 handed, but would be the 'high jack' (HJ) is 6 handed. They are still significantly OOP, but less so than UTG so can play slightly more hands.
The closer one gets to the BTN the more hands one can play, often the BTN can play at least 60% of hands.