Cloud data is a feature that allows users to store variables "in the cloud," or on the server. Cloud variables have the character "☁" (a cloud icon in the font Scratch uses) in front of them, to distinguish from regular variables.
The Scratch Wiki is a collaboratively-written wiki available for free that provides information about the Scratch programming language, its website, history and phenomena surrounding it. The wiki is supported by the international Scratch Wiki community, and is mainly edited by Scratchers. The Scratch Wiki is a popular source of information for the website, scripts and tutorials and it continues to grow as Scratchers use it as their primary source of information. The Wiki also includes advanced articles for Scratchers around the world to build, share and see.