To me it looks like spam

https://themeisle.com/blog/wordpress-pingbacks/

Hi Daisy,

I have received three of them. I just deleted them. This is not to say you should do as I did.

I just read KC's comment, he did google it and is a step ahead. I certainly would consider his last sentence.

Wishing you well,

Michael

Never seen that befor Daisy, but it has KC days makes sense, tread carefully. Jim

I don't know but here is what I found when I Googled it:

A trackback allows one website to notify another about an update. It is one of four types of linkback methods for website authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to their articles.

I wouldn't click on any links until you know for sure though.

I'd love the answer to this as well Daisy
I got one of these too
Vicki