Marketplaces by types of participants: C2C, B2C and B2B

According to Statista, in 2017 online sales reached $2.304 trillion and 58.9% ($1.357 trillion) were done on mobile devices. E-commerce sales are predicted to reach $4.848 trillion by 2021 and m-commerce is expected to account for 73.3% ($3.556 trillion) of these. Statista: Source 1, Source 2. ................
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