According to research conducted by AppLovin and reported by Marketing Land:

Using a mix of its own data and third party data, mobile ad personalization platform AppLovin is predicting that nearly 30 percent of Cyber Monday transactions this year will come on mobile devices. This is transactions — not traffic. AppLovin points out that in 2010 mobile transactions represented only 2 percent of Cyber Monday buying. However mobile commerce has been growing steadily despite considerable friction in the mobile shopping and checkout process.

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