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Data analysis is basically a PROCESS of analyzing, modeling, and interpreting data to draw insights or CONCLUSIONS. With the insights gained, informed decisions can be MADE.  It is used by every industry, which is why data analysts are in high demand. A Data Analyst's sole responsibility is to play AROUND with large AMOUNTS of data and search for hidden insights. By interpreting a wide range of data, data analysts assist organizations in understanding the business's current state.