This is the 777th most frequent French word.
mettant
"Putting" or "placing."
Here, 'mettant' is part of a gerundive construction, showing simultaneous actions of working and placing effort.
Ils travaillent tout en mettant leur énergie dans ce projet.
They are working while putting their energy into this project.
In this sentence, 'mettant' is used in a prepositional phrase to highlight the means by which the beautification was achieved.
En mettant des fleurs sur la table, il a embelli la pièce.
By putting flowers on the table, he made the room more beautiful.
The word 'mettant' functions as a present participle here, indicating an ongoing action of 'mettre en pratique.'