Islands is a gamemode where you spawn on an island that's almost submerged in water. You use your limited resources to survive!
The gamemode has many goals that can be achieved. Many players make farms and grinders in order to become rich or you can compete for points, cubits etc via leaderboards. If you don't want to compete for leaderboards, you can play normally and build an island that you like.
While Islands has many competitive features, the wonderful community is also here to lend a hand when you need it! Many features that this gamemode offers can be achieved by involving the community to help you along the way. There are separate guides to all of the features that are associated with Islands throughout the Wiki.