I use the MIT license and it has this format as per example at link :
The MIT License (MIT)
Copyright (c) <year> <copyright holders>
Permission is ...
I also see many websites adding the text "Copyright" in the footer, however I've heard that in fact these sites do not have "copyright", people put this in the footer by simply placing.
So what I would like to understand is that let's say that the data on the site does not have a "set license", is the copyright in the footer almost a mistake?
Or copyright is a term that I can "tell" what copy rights over content or code?
What does this term actually mean?