You know, some apps can access your camera and some websites can listen into your microphone.
Your apps might be spying on you.
Looking at where you've been on the Internet, that kind of thing.
That's not the worst bit.
A fraudster could get access to the passwords you type in on your phone.
You know, for your bank accounts and stuff, and then they have access to anything on your phone.
You should probably do a safety check.
See who's watching.
Stop fraudsters from tracking what you're doing.
Search Apple Safety Check or Google Play Protect to keep your devices safe.