Supposedly, there is to be found in the repertoire a congregational hymn that fits well with one or more of the readings of the day. In my exposure to some Protestant and Anglican traditions, such a hymn might be sung after the homily or sermon. Before the Creed wraps up the Liturgy of the Word, we get one last text that might or might not match the preaching. But it might offer an additional insight to the readings.
Other communities place this hymn at a more “Catholic” spot in the Mass–maybe one of the sandwich layers.
What do you think? Too much of a Protestant idea? The Mass propers cover it already? A hymn after the homily is a good, bad or indifferent idea? Sit in the purple chair and render judgment.