What is SPR in poker?

I read something about this, but I don´t understand very well. Could you help me explain to me, and how can use it when I am playing poker?

stack-to-pot ratio.

SPR is the effective stack sizes divided by the size of the pot on the flop or risk over reward.

OUr decisions would vary based on the size of the pot in relation to our stack.

Stack to Pot Ratio. It means studying the relative sizes of the pot and of the players` stacks, in order to adjust your play accordingly.

Some rough examples -

When holding (say) an up and down straight draw on the flop, if there is $5 in the pot and both you and the opponent have $90 behind, you can call a modest flop bet, because you have the possibility to win a big pot if you hit. However, if the stacks are only $20, you should fold to a bet. In this case, the ultimate possible pot size isn`t enough to give you odds to draw.

Also, if you hit a big hand (but not the nuts) on the flop, and there is $5 in the pot with $20 behind, you can profitably bet all-in. However, if the stack sizes are again $90, an all-in bet is unwise (because you will force most of the hands that you beat to fold, and will only be called when you are behind).

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Oh, sorry. That`s pretty much what the previous poster said too - obviously types faster than me.

kind of tells you how commited too a pot you are and only applies to the FLop not on the turn