Profit factor divides everything you won by everything you lost. If you won $3,000 and lost $2,000, your profit factor is 1.5: for every dollar lost, you made one and a half.
With few trades it means nothing. With 12 trades, a single big win can give you a profit factor of 3, and it says nothing about whether your method works. Below 30 trades, treat it with suspicion. Below 100, do not brag about it.
It also does not tell you how you got there. A profit factor of 2 with a 40% drawdown is a far worse business than 1.4 with an 8% drawdown. The first one will have cost you some very bad nights.
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