What is the best level to find iron in minecraft?

As an AI language model, I can give you the following information:

In Minecraft, iron can be found in all levels of the game, from the surface to the bedrock layer. However, the best level to find iron is between 1 and 63, where it generates in large veins.

To be more specific, iron ore can be found in veins of 1-12 blocks in the Overworld, and up to 20 blocks in the Deepslate layer. The average vein size of iron ore is around 6 blocks.

Players can easily locate iron ore by mining in caves, ravines, and abandoned mineshafts. However, a more efficient method of finding iron is by digging staircases down to level 11 or 12 and mining in straight lines in opposite directions. This method has a higher chance of uncovering large veins of iron compared to mining randomly.

Overall, level 11 or 12 is considered to be the best level to mine for iron in Minecraft due to the high concentration of iron ore veins found in this range.