Scared about viruses etc

So i asked a question like this before, but im still really scared.

A pop up on a website said: download vpn, there was no button to exit so i went to general and removed website data.

I dont know if theres anything on my phone, its not jailbroken (idk what that is but i dont touch my phone) and is updated to 15.2 (recent one)

Anything to be worried about? Or was it just a popup trying to redirect me?