How do I block an email?

It would be best to google this and look down the list of results for those which apply solely to your email service provider, i.e. hotmail, google, yahoo, and so on as they all vary in functionality.
If it’s not straightforward to do on your iPad or you don’t understand the terminology, and you can access your emails elsewhere, such as on a laptop or if you haven’t got access, by using a library computer, it should be much easier to do using the ‘windows’ format rather than on an iPad which has a different operating system (iOS)

The person you want to block has to have sent you an email. Open one of the emails they have sent you, and somewhere inside the email there might be three vertical dots. Click on those three vertical dots and there might be an option to block

Yes. What DINNO says works. I've just looked.

If it is a business email, you can 'unsuscribe' (look at the top of the email)

(I didn't know that)

DINNO, I'll try that. Thanks.

No vertical dots in the emails on iPad, DINNO. I’ll try on my laptop and see if there’s an option as Moongirl suggests.
It’s not a business one, crazyH, unfortunately. I’ve found out how to unsubscribe from them. I was being plagued by all sorts of ‘suggestive’ offers....?

I’ve done it. Found the way to do it on my laptop. It gives the option to blacklist the sender.
Thanks everyone. ?