This is used in an economic context:
We don't monetize ourselves properly, so we don't hit margins.
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One of the meanings of hit is to reach or attain (a specified level or amount); profit margin is the amount by which revenue from sales exceeds costs in a business.
Prices are expected to hit a new low.
The new train cab hit 100 mph.
The sentence you reported can be rewritten as
We don't monetize ourselves properly, so we don't reach high profit margins.
Margins are edges of a thing. In finance, a margin is "a sum deposited with a broker to cover the risk of loss on a transaction or account." There is no larger context to the sentence, but I would expect that the word monetize signifies that the term is being used in the financial sense. What it probably means is that the enterprise is worried that if it doesn't get enough capital going forward, the creditors are likely to call in the debt.