This is the 315th most frequent Italian word.
mette
"Put" or "places" (third person singular present tense of "mettere").
Here 'mette' is used in its literal sense meaning 'places' or 'puts'.
Luisa mette i libri sul tavolo.
Luisa places the books on the table.
'Mette' is used figuratively here, signifying 'puts' or 'dedicates' effort or feeling.
Ogni giorno, Marco mette molta passione nel suo lavoro.
Every day, Marco puts a lot of passion into his work.
In this context, 'mette' means 'brings up', implying a more metaphorical usage.