Google uses labels rather than folders and although they look similar, they have distinct differences. Remember, you always only have 1 copy of any email in your inbox. If you want to organize your inbox into different views, you can apply labels to specific groups of messages. Labels can be created, edited and deleted.
Note: Labels are different from folders. If you delete a message, it will be erased from every label that it’s attached to and your entire inbox. If you want to remove an email from a 'folder', you would remove the label on that email.