Amazon reported a 51% jump in advertising revenue to almost $US5.4 billion in the September quarter.
The year-on-year rise compares to $US4.2 billion in revenue generated mostly by advertising in the June quarter this year.
But the giant online retailer is still essentially an ecommerce company, reporting $US48.35 billion in sales form online stores, a rise of 38%.
In Australia, Amazon advertising launched in April 2019.
eMarketer estimates Amazon's worldwide ecommerce sales will grow more than 37% to $US476.02 billion in 2020. That gives Amazon a 12.2% share of the global ecommerce market.
"Amazon's Q3 surpassed every expectation on the top and bottom lines, particularly considering the company pushed Prime Day into Q4 this year," says Andrew Lipsman, eMarketer principal analyst.
"While it was clear that the pandemic-driven shift to ecommerce would keep Amazon's topline elevated, it surprised by easily surpassing an already high bar.
"More importantly, profits soared on strong growth in 3rd party seller services and a big acceleration in Amazon's high-margin ad business as the digital ad market recovered."
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