Variables

You can store any number of user-defined variables, which are "strings" - that is they can hold any text, including multiple lines. These are saved when you save the "world" file, so each world can remember things from one session to the next (eg. the names of potions you have found).

You can also store variables inside plugins. If the plugin is set to "save state" then any variables inside that plugin are automatically saved when the plugin closes.