Dpi number generated by camera in JPG have any meaning?

I have two cameras, a 6mpix Panasonic FZ8, and 14mpix Canon A2200.

When I compare shots from two cameras, one of differences I notice is

dpi number that camera reports in JPG info:

    FZ8 reports dpi=72

    A2200 reports dpi=180

What physical meaning can these numbers have?

Scholar Asked on June 14, 2018 in TECHNOLOGY.
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