You can reuse the adjustments
that you’ve made to an image. You can save all of the current Camera
Raw image settings, or any subset of them, as a preset or as a new
set of defaults. The default settings apply to a specific camera
model, a specific camera serial number, or a specific ISO setting,
depending on the settings in the Default Image Settings section
of the Camera Raw preferences.
Presets appear by name in the
Presets tab, in the Edit > Develop Settings menu in
Bridge, in the context menu for camera raw images in Bridge, and
in the Apply Presets submenu of the Camera Raw Settings menu in
the Camera Raw dialog box. Presets are not listed in these locations
if you don’t save them to the Camera Raw settings folder. However,
you can use the Load Settings command to browse for and apply settings
saved elsewhere.

You can save and delete presets
using the buttons at the bottom of the Presets tab.