Opportunities in mobile advertising were a major factor that compelled Google to enter the phone space.

As cell phones proliferate and become smarter, mobile advertising could take off.

"We'll continue to see richer and better mobile advertising across all kinds of content."

To get more marketers, Nokia announced last week two new services to increase mobile advertising.

Informa reported that mobile advertising in 2007 was worth $2.2 billion.

Types of mobile advertising are expected to change rapidly.

However, some mobile advertising is sent without a required permission from the consumer causing privacy violations.

"This is a pretty serious opportunity," Jobs noted, while saying that a lot of current mobile advertising "just sucks."

The company also gives marketers an opportunity to expand their reach in mobile advertising.

EMarketer predicted this month that mobile advertising would reach $4.8 billion across the country by 2011.