How do you build large structures fast on minecraft pocket edition?

To build large structures quickly in minecraft Pocket Edition, utilize the following strategies: First, gather materials in bulk to avoid constant trips for resources. Use the "copy and paste" feature of certain mods or build tools if available, or employ the "schematic" feature in creative mode for rapid replication. Additionally, consider using the "WorldEdit" tool, which allows for efficient block manipulation, and coordinate with friends to speed up the construction process.