Legally permitted uses as a user
In principle, copyright law is simple:
Permission is required for any use of a copyrighted work!
If you want to use texts, music, films, pictures, photographs, computer games or other works on a website, you need the permission of the author.
Most significant for users is private use: We are all allowed to use published works and performances privately, i.e. in the circle of people with whom we are closely connected, such as family and friends. However, this only includes those closest to us, neither all of our work colleagues nor the 700 friends on Facebook.
Example: You play a recording of a famous singer at home in the presence of your friends. If your friends like the recording, you can make a copy and give it to them. However, if you want to use the recording as background music on your website, you need the permission of the author.