This is the 132nd most frequent Dutch word.
vanaf
"Vanaf" means "from" or "starting at" in English.
In this sentence, 'vanaf' indicates the starting point in time for the action of beginning a new habit.
Vanaf vandaag begin ik met een nieuwe gewoonte.
Starting today, I'm beginning with a new habit.
Here, 'vanaf' specifies the starting location (the mountain) of the act of looking.
Hij keek vanaf de berg naar het dal beneden.
He looked from the mountain down to the valley below.
In this case, 'vanaf' indicates the starting time at which the exhibition becomes accessible.