A new infograohic shows the growth of mobile marketing, with US spending increasing by 75% since 2009, while it is predicted to reach $2.3bn by 2013. 

The infographic, from Microsoft Tag, also shows that the average mobile app session lasts 4.3 minutes, compared with one minute online. 

Econsultancy’s Marketing Budgets report showed similar trends towards mobile marketing, with 62% of respondents planning to increase their mobile budgets in 2011. 

What best describes your company’s budget plans for the following digital marketing channels in 2011?

Mobile search is another growth area, with the proportion of companies using mobile search as part of their marketing strategy growing from 8% in 2010 to 16% this year, while a further 45% are planning to invest in mobile search.

Budgets are still small, which suggests plenty of room for growth. Only 2% of client-side paid search budget is spent on mobile search, while supply-side respondents say the average for their clients is 5%.