It implies that you know there is another six-character mantra at home. At this time, if you are happy, you will naturally have a heart of chanting Buddha, and you will achieve your goal.
When you see the Daming mantra, you will naturally have the heart to read Buddha, dharma and monk. Only by following the teaching can you play a role.
Reciting is the most important thing.
If it's just hanging, it's of little use.