Balayage is a form of highlighting that involves hand painting various sections of hair, very subtly at the root moving into more strength towards the ends. This is a very natural, sun kissed look that doesn't involve every strand. The grow out is soft and natural, and the effect is too.
*as a side note, both of these techniques are advanced and are best left to an experienced, long time stylist. To correct a botched job is always difficult, time consuming and expensive. Moral of the story...leave it to the licensed professionals!!