You all seem to know this. . But what is pingback on WordPress and how do I share posts if I write something for a challenge?

I can use this site but there are various things that are either not simple, or not explained.  I know a few people that have jojned then given up.

My e-mail box is generally full these days  and though I try an read everything it’s sometimes hard to read 50 or 60 emails in a sitting x

Anyway please let me know what to do to ping back. Also can you share video here?

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