The Internet is a massive tool filled with all kinds of different people and information
This makes it extremely hard to regulate and many users can come across content that may offend or make them uncomfortable
This is content could trigger depression, anxiety, or just general discomfort in the viewer when they come across it
To avoid this kind of content, always be aware of what websites are safe for viewing by only visiting known and reputable websites that you are familiar and comfortable with
If you find content that disturbs you, the first step is to click off the website and blacklist it (make note never to visit the site again)
Due to freedom of speech laws, and the possibility of websites being hosted in other countries, content like, clashing political views, offensive or racist ideologies etc, cannot be removed and the best way to deal with them is avoid websites where content like that is present.
If something online really does disturb you, talk to a parent, trusted friend, or councilor for guidance.