Owners of Samsung Galaxy S8, S8+ and Note 8 received completely new option named Bixby. Bixby is an virtual assistant projected especially for Samsung's phones, but in fact project received bad reviews. The main reason why is that Bixby doesn't support many languages, and button assigned for Bixby was tragically located. In this situation whole option was useless, and people were asking for the option to remove this feature. But now Samsung released Bixby's update which finally will solve this problem.
After downloading an update users will have option to disable Bixby button and then it won't respond in any way. If you can't find place where you can download this update, go to "My apps", then open "Update" and choose "Update all" button.