What can I do to protect me from hackers?

You are not getting hacked because it is nearly impossible to hack into an iPhone. What is possible is that your Apple ID and Password may be compromised by sharing it with someone else or by falling for a phishing scam. If this is the case then change the password to your Apple ID immediately. If not then let's look for some explanations for what you are experiencing.

1. Top left corner: You are seeing the location services arrow. This can be from apps that may be running in the background (Home monitoring app for example) OR from system services that may need your location. You can turn OFF the display of the locations services error on your screen if system services is using your location by opening Settings ➔ Privacy ➔ Location Services ➔ Status Bar Icon (All the way down) : Set this to OFF.
2. I do not have an explanation of why that Snapchat website ended up in your browser history if you or someone else did not visit it previously. Monitor your activity for a few days and see if you continue to notice anything unusual.

Axel F.

You no can get “hacked,” unless you jailbreak your iPhone. In your iPhone go Settings > Safari > Clear History & Website Data.