It;s data that represents real world data but is not real
If I am writing a program to accept credit card applications, I want to test it. I am not going to feed it personal information from real people. I will assemble fake profiles of data (John Smith from 123 Anywhere Street) that will match what the expected inputs should be but will not be from a real source. That’s synthetic data – Data that does not exit in the real world, but functions the same as actual data from the real world in all other aspects.
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