What exactly is technique?
For the performing musician, technique is the use of physical components - hands, fingers, lips, and any other needed body parts - to develop the specific advanced motion and control to play at your best level.
Skill and ability
grammar in literature is the mode of the expression of style. without punctuation, writing would be bland, indeed. all of the best writers use punctuation to form written thoughts in a way which shows their intended meanings, that is style of expression. each sentence should be a complete thought.
In what context?