Minecraft wiki entry for Map_downloads, associated text: 1 Download a world
2 Instructions
2.1 Prerequisites
2.2 Bedrock Specific Instructions (Android/Fire OS/iOS/Windows 10) (Recommended)
2.3 Java & Bedrock Instructions
2.3.1 Extract the world
2.3.2 Importing into Minecraft
2.3.3 Find the folder in Minecraft
3 Alternate Instructions
4 Tips