This survival map is called SkyBlock, and it is an place, where players staying on floating island and can live and play with each other. Main goal to survive on this island is playing without cheating, grow your own home and food and challenge with other players. There will be a huge ice biom, where you can find floating island and exactly this is called SkyBlock map.
Note that this mod for Minecraft was made by fans and requires installed Minecraft Pocket Edition at players device to be fully work.
SkyBlock have different game modes, player can play solo or can use multiplayer servers with this map and play with another players at the same time.
Also, SkyBlock can be played only in one gamemode and in one difficulty, Easy and survival.
This is NOT an official Minecraft product, and is NOT affiliated with Mojang AB in any way. All Minecraft brands are property of Mojang AB. Consult the appropriate usage guidelines at https://account.mojang.com/documents/brand_guidelines