There are many dangerous situation like scams,phishing.
Phishing is when people send clickbait messages making you join a scam or download dangerous software for example:You have won some money Click here to get your money,the best way to handle this situation is to ignore it.
Scams is when people trick you into giving money to them. For example: I am a Nigerian prince who has been exiled from his kingdom. I ask that you help me by donating just $100. I will pay you back when I can pay for my freedom and get back to my kingdom.The best way to handle it is to delete the email.
Malware download is when ads or apps make you download software that makes your computer slow or steals information. The best way to handle it is to use a virus checker and delete it.
When you are on the internet make sure to check with the people that you are talking to because you might be leaded to dangerous situations.