Amazon's ad business accelerated its growth last year and now accounts for 7.0% of global online advertising spend, according to a WARC Data analysis of the company's latest reports. This is almost double the share recorded just two years before.

Why it matters

Amazon is the most popular shopping platform for many consumers and has delivered a strong return on adspend for many advertisers. Growth in its ad business shows no sign of slowing as the e-commerce competition heats up and the platform branches out into new formats like shoppable video.

Takeaways

• The festive...