Why Adverts?

[#1]

Why am I getting adverts?

When I read or send a text to a friend, below it there an advert appears.

[#2]

I don’t think this would be anything to do with PN, more likely something amiss on your phone.

[#3]

It sounds like an issue with the messaging app you're using, or if you're using the default, some kind of malware. Try checking the appropriate app store for an antivirus and malware bytes software, hopefully this will resolve your issue.