"In 2018, we improved Alexa's ability to understand requests and answer questions by more than 20% through advances in machine learning, we added billions of facts making Alexa more knowledgeable than ever, developers doubled the number of Alexa skills to over 80,000, and customers spoke to Alexa tens of billions more times in 2018 compared to 2017".
Shares of the company fell 1.1 per cent to US$1,700 in trading after the bell. It's harder to keep growing fast with quarterly sales that stretch to 11 digits.
Sales will be $56 billion to $60 billion in the current period, the company said Thursday, compared with analysts' average estimate of $61 billion.
Revenues of $232.9bn were up by 31 per cent from $177.9bn past year. Though fourth-quarter sales and earnings topped analysts' estimates, growth in the North American retail unit slowed dramatically in the key holiday period, and comments about uncertainty in India sent the stock lower.
But the company's 19.7 percent year-over-year sales growth represented a substantial slowdown from growth rates ranging from 25 to 43 percent the previous six quarters, due in part to the law of large numbers.
Amazon's "other" business segment - consisting mainly of its fast-growing advertising business - generated almost $3.8 billion in sales in the quarter, up 97 percent.
Ultimately, AWS income of $2.177 billion delivered more than two-thirds of the e-commerce giant's total profits.
Stay humble, Paul Pogba warns Manchester United after Burnley stumble
The former Monaco attacker left the Ligue 1 to move to Manchester United when Dutch boss Louis van Gaal was in charge of the club. United had told the player he was under no pressure to leave but that they would be open to a serious offer to sign him.
Revenue in its Amazon Web Services cloud business surged 45.3 percent to $7.43 billion to beat estimate of $7.26 billion.
Wall Street was looking for earnings of $5.67 per share on revenue of $71.87 billion. Operating expenses grew 18 per cent in the recent quarter.
Amazon is expected to roll out the attribution tool more widely this year, and advertisers say the early results were already promising, showing that Amazon ads are driving sales. Shares fluctuated between gains and losses in extended trading after the report and were little changed at 5:19 p.m.in NY.
Shares, however, slid 5.4 percent to $1,625 in after-market trades that followed release of the earnings results.
Olsavsky said on a call with analysts that he expects company spending on things like warehouse space and employees to increase this year after Amazon slowed down its capital spending in 2018.
The fourth quarter offered investors the first glimpse of year-over-year results since Amazon's $13.7 billion acquisition of Whole Foods Market in 2017.
Amazon also has been growing its sales from physical stores, including its recently acquired Whole Foods grocery chain. The stock closed Thursday at $1,718.73, up 2.8 percent.
Bezos pointed to the Amazon-branded Echo speakers that are at the heart of the new strategy.