unsolicited Calendar invitations

I’ve been receiving this type info through my google calendar and I’m not sure if it’s real or a hack. Can someone help?

(3) Vulnerabilities detected

Did you visit an insecure site recently?

Possible virus or malware detected on your Apple iPhone. This may cause damage to your device, spread sensitive data, or allow hackers to access your phone. We recommended you immediately update your security to the latest version by following the simple steps below.

Here is how you can repair your iPhone in just a few seconds (Step by Step)

1.

2. Download and run the recommended security app

Once you run the app and follow the on screen instructions, your iPhone will be protected and you will no longer receive security update notifications.

[Edited by Moderator]