CamelCase is formed by taking a phrase, capitalising the initial letter of each word, and smashing the words together to form a portmanteau word. Traditionally most wikis including ~TiddlyWiki use CamelCase to signal phrases that should automatically become links.
You can also [[disable CamelCase linking in TiddlyWiki|How to turn off camel case linking]] if you want.
<<.from-version 5.3.0>> ~CamelCase is disabled by default in new wikis.