This is for Minecraft Bedrock Edition

To find your worlds folder for Minecraft Bedrock Edition, enter the following string in either the windows search box or in Run (windows+R): 
%LocalAppData%\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\games\com.mojang\minecraftWorlds

This will open the folder for your Minecraft worlds. Extract the .zip file into there.