Interpretation of IRFs

Hi, I have a basic question. When the model is expressed in levels, how do we interpret the IRFs. I am attaching some IRFs. Would appreciate if somebody could help interpret the IRFs.EPSM_3

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Thank you! This is really helpful.

I had IRFs like this in a fairly large model, and I taught there is probably a mistake somewhere. But maybe, my model is fine. I will check though.