I'd say that a "faith movement" is a significant development in Christianity which isn't associated with any particular denomination. There has to be some term for it, so I can understand why this one is being used.
It also explains why you get information on charismatic Christians when you turn to a search engine. That is a movement that has blossomed in recent decades, but it's not associated with just one or a few church bodies. There are, in fact, charismatic study groups or charismatic worship services in a number of the older denominations now in addition to the Assemblies of God, the Church of God, and other denominations that are known as Pentecostal churches.
So, that's an example that was raised. There are other "movements" in addition to the charismatic movement.