I want to know the answer to the following question:
What was the benefit of using small pieces to create a mosaic?
All the background I'm provided with is that "There were two main techniques in Greco-Roman mosaic: opus vermiculatum used tiny tesserae, typically cubes of 4 millimeters or less, and was produced in workshops in relatively small panels which were transported to the site glued to some temporary support.". Is that enough to answer the question?
Answer: no