What Does Developer Mean in Android?

Is it safe to use developer option in Android?

It never affects the performance of the device. Since android is open source developer domain it just provides permissions which are useful when you develop application. Some for example USB debugging, bug report shortcut etc. So no offense if you enable developer option.

Should developer options be on or off?

Android hides the Developer options menu by default. Because the options aren’t necessary for normal use, this keeps inexperienced users from changing settings that could end up harming performance. While we’ll explain each setting as we go through them, be sure to watch what you tap in this menu.