Board Thread:Questions and Answers/@comment-31479589-20190629000505/@comment-31479589-20190711035640

A sandbox is a testing environment that isolates untested code changes and outright experimentation from the production environment or repository, in the context of software development including Web development and revision control. Wikis also typically employ a shared sandbox model of testing, though it is intended principally for learning and outright experimentation with features rather than for testing of alterations to existing content.

Here, we use it mainly for storing things. Iirc, Su once used it to test some codes for a template, although she now stores templates there for easy access and use. Warrior stores in-game image layers that form a full-sized location pic when arranged together, is an example of what you'll get by arranging those layers. Me, I uses it to store drafts for upcoming contents, such as Creator, Shadow and SFA.