You apply either of two types of automatic kerning: metrics kerning or optical kerning, or you can adjust the spacing between letters manually.
To avoid using the built-in kerning information
of a font for selected text, choose “0” in the Kerning menu.
The amount of the word kerning adjustment is the same as the Kerning value in the Units & Increments Preferences dialog box. When you press the shortcut and hold down the Ctrl or Command key, the kerning amount is the Kerning preferences value multiplied by 5.