There is a great deal of philosophy background to consider when speaking about artistic techniques. Books are written on this subject, ad infinitum — one has to only to refer to the Greek view of Techne here to encounter the depth of the question of technique. According to Martin Heidegger, “…the Greek word techne, from which “technology” derives, at one time also meant the “bringing-forth of the true into the beautiful” and “the poiesis of the fine arts…In contrast to Heidegger’s notion of a thing or of revealing stands the kind of objectivity for which our natural sciences strive.” https://www.thenewatlantis.com/publications/understanding-heidegger-on-technology
From one point of view then, a technique in art is the process of ‘revealing” that which is there, but also revealing that which is usually hidden by the conventionality of the everyday.
My idea of technique is a process of revealing – making visible- and it is to this end that specific methods are used in painting and art to suggest and create passageways through which meaning can evolve.
One can begin with the standard or conventional methods of techniques we find in artistic praxis. Here is a basic but useful overview of some of the most common art “ techniques” that are used. 7 must-know painting techniques for artists By Dave Kendall (https://www.creativebloq.com/art/painting-techniques-artists-31619638)
Technique, therefore, should not be understood only in terms of their decorative possibilities. They must come from a deeper source. When Pollock used his drip painting technique, he was not trying to be ‘different” but was responding to a more profound urgency to reveal and bring to light something that was hidden within his art –and this technique allowed him to do just this.