According to the World Bank, if you're living on $1.90 a day or less, you're living in extreme poverty.
The 767 million people in that category have $1.90 a day or less in purchasing power to fulfill their daily needs.
Most of that money goes for food – only it may not be enough to purchase nutritious food or to stave off hunger. Hundreds of millions of the extreme poor are malnourished.
Their housing may be of low quality. And they may not have enough money for school fees (primary education isn't always free) or health-care expenses.