In sum, it tells when OSX Protect was last updated on your machine.

Safe Download Version is a Mac OS X application that shows which safe downloads definition list version is installed, along with the date and time the definition list was last updated on your computer.

Harv
27" i7 iMac (10.13.6), iPhone Xs Max (12.1)

Those who can make you believe absurdities can make you commit atrocities. ~Voltaire