Facebook 'meta property tags'

Hi guys,

I know there are some brilliant people on these forums. I have been reading them for years. You guys have helped me a lot, many thanks!

My issue today…
I have these “meta property tags” you can see if you look at my source page at https://www.joeleavers.com.
These have been wrong almost since day one but I didn’t realize it until I posted my link on fb. I have a completely different focus on this site and need to delete these tags safely. But I can’t find where there at to do so.

Can you please tell a newbe how to do this?

Thanks
Joe