As the screenshot above shows, the comments look like they're coming from Google, they're not, are they?

The email that I receive when one of these is shared says that it's a TrackBack.

Should I be marking these as spam, deleting them, approving them or doing something else with them?

Is there a way to prevent them?

They're not a good thing, are they?

Why am I receiving them, do you know?

Thank you for commenting, asking more questions and/or answering some of the questions!