Terms are constant values that are used to tag data using the type system, and are always of the aura @tas. These are strings preceded with a % and made up of lower-case letters, numbers, and hyphens, i.e., ‘kebab case’. The first character after the % must be a letter. For example, %a, %hello, %this-is-kebab-case123. You can think of these as tags (metadata), like hashtags, or flags, or symbols, to indicate meaning to some part of the code.