This is the 4598th most frequent Russian word.
давить
To press, squeeze, or oppress.
The verb 'давить' here is used to mean applying physical pressure to something, in this case a button.
Он давит на кнопку чтобы включить свет.
He presses the button to turn on the light.
The word 'давить' describes the sensation of tightness or pressure from wearing footwear.
Эти туфли давят мне на ноги.
These shoes press painfully against my feet.
Here, 'давить' metaphorically means applying psychological pressure or influence on someone.