as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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provide a summary of facebook's revenue sources in the fiscal year 2019.
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in the fiscal year 2019, facebook generated revenue from advertising, payments and other fees, and its other businesses, such as oculus and its virtual reality products. advertising revenue accounted for 98% of its total revenue, payments and other fees added 2%, while its other businesses accounted for less than 1% of total revenue.
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