Four billion.
According to a new study, this is the number of monthly page views that Facebook has slowly but surely lost over the past two years.

According to the study, Facebook traffic has not only halved since 2016. The data shows that YouTube is about to become the second largest website in the US and would throw Facebook from its social media throne. Google, which owns YouTube, would thus secure the first two places and Facebook would only remain the third place.

Source: https://www.unternehmer.de/marketing-vertrieb/199688-facebook-traffic