Shortcodes in Sidebar allows shortcodes to execute in sidebars.
Q - Are there any settings?
A - No, The function is either activated or not.
Q - Why did you create a plugin for this function?
A - By having it as a plugin it works without needing to edit a themes functions file.The advantage is you can change your WordPress theme and your sidebar shortcodes will continue to work with needing to edit the theme functions.