I think they just mean the meaning of the data that comes through, which naturally consitutes the information important to that domain. I work in fintech, the

I think they just mean the meaning of the data that comes through, which naturally consitutes the information important to that domain. I work in fintech, the data points of my domain are transactions, prices, properties of different instruments, etc. This data is moved + manipulated in different ways using different formats by different systems, but each day I accumulate useful context and expertise on the data of my domain.