A growing number of people are getting their online content on their mobile devices which means that some companies may want to consider shifting budgets to mobile marketing.

DMNews reports that the Mobile Marketing Association announced at its MMA Forum in New York this week that although mobile marketing only made up 1.8 percent of all marketing in 2008, the average budget is growing 26 percent each year.

While this new form of marketing is continuing to grow each year, experts say that it must still develop a level of trust with consumers before it is widely accepted.

Gloria Wood, vice president and editorial director at Advertising Database, said this trust issue is paramount for having customers get on board the mobile marketing movement.

"Instead of just getting a business message or an offer, there has to be something of value to the consumer," she said, according to DMNews. "Engagement marketing has got to be important in mobile to help build trust with consumers."

Aside from changing how companies market to consumers, mobile phones are likely to change the way firms deal with search engine optimization.

In an article earlier this year for Search Engine Land, Bryson Meunier said that mobile users tend to search for things differently than more traditional counterparts meaning that some content may need to be optimized specifically for people who access the internet on their phone.