Your iPhone is infected with a virus

Porsche Girl wrote:

Thank you but how do I stop the pop ups? It’s only happening to one of my two iPhones. They both use the same Apple iCloud login.

It isn’t coming from your iPhone, but rather that site. Don’t open that site that is presenting the popups.

You don't have any viruses on your phone, it is a scam message designed to get you to purchase unnecessary software or phish for personal information.

Read more about it here -

Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

Scam.

The claim that they can damage your hardware should be a dead giveaway.

U.S. Federal Trade Commission – How To Spot, Avoid, and Report Tech Support Scams

"Tech support scammers may try to trick you with a pop-up window that appears on your computer screen. It might look like an error message from your operating system or antivirus software, and it might use logos from trusted companies or websites. The message in the window warns you about a security issue on your computer and tells you to call a phone number to get help.

…

If you get this kind of pop-up window on your computer, don’t call the number. Real security warnings and messages will never ask you to call a phone number."

It's a scam; there's nothing to get rid of. A message warning of malware will only be legitimate if it's in response to manually starting a scanner or uploading a file to a website.

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Your iPhone is not susceptible to viruses and as such it does not have any.