Use ～という（のは） in writing or formal speech to package a whole clause into a noun phrase you can then comment on, evaluate, or define — typically the topic of a judgment (「～というのは問題だ」「～という事実」). It is the standard way to foreground a situation for assessment in reports, minutes, and negotiation email, where simply saying 「～は」 would be ungrammatical. It also introduces terms and definitions (「Xというのは～のことだ」), a very common move in specifications and explanatory documents.