[il]

They certainly built a great product, but it's easier to gain market share when you have a $300 million marketing budget.

Aside from heavy branding, they also built an absolutely brilliant, perfectly executed long-tail SEM campaign.

According to my internal data, Bing is one of the largest advertisers on both Yahoo and Google, approaching eBay and Amazon in volume.

SEMRush shows 50,000 paid keywords for Bing- but that's a tiny fraction of their actual ad spend.