Extra virgin olive oil is a high grade, unrefined oil made using a low-heat extraction process that preserves more flavour, aroma, and nutritional properties. The final taste of the extra virgin olive oil depends on the specific cultivar and the soil and climate conditions where the olives were grown.
In contrast, regular olive oil is typically a blend of refined and virgin oils. Its extraction and refinement involve higher temperatures, diminishing some of the oil's flavours and natural qualities.
Read more: How Is Olive Oil Made?