For acoustic guitars, "set up" mostly means turning the truss rod to adjust the curvature/straightness of the neck. Some people adjust it once as "set & forge

For acoustic guitars, "set up" mostly means turning the truss rod to adjust the curvature/straightness of the neck. Some people adjust it once as "set & forget" while others might change it twice a year (adjust in the summer counteract higher humidity and again in the winter to compensate for lower humidity). Acoustic set up can also include filing down the nut slots to make it easier to fret. The issue is that a mistake is not as easy to reverse as a truss rod adjustment. If one is not willing to do a DIY nut replacement[1], you'd have to pay a repair shop ~$100 to fix the mistake. Same pitfalls can happen if one tries to polish frets with steel wool and gets over aggressive causing unwanted buzzing. Electric guitars set up will include individual string intonation, string heights, tension on springs if it's a floating whammy bar, pickup height, etc. It has more hardware machinery to tweak. https://www.google.com/search?q=acoustic+guitar+nut+replacement https://www.google.com/search?q=acoustic+guitar+nut+replacem...