The global number of internet users has reached 2 billion, with most users located in Asia, especially China, which saw 30% growth in internet users last year compared to 10% in the US. Social networking is a major online activity, with the US market having 213 million social network users spending on average 32 hours per month on the platforms. Search engines and mobile internet also see significant usage, with Google handling 75% of search traffic and smartphones pushing mobile internet usage to over 20% of online activity. E-commerce generated $210 billion in revenue last year, with travel sales making up 43% of that total.