Google has doubled the storage capacity of its email service to 2 GB as part of Gmail’s first birthday celebrations, the company said Friday, in an effort to retain users and increase the audience for its advertisers.The company said its goal is to increase storage capacity to the maximum possible. Analysts view this as a boost to Google’s advertising offerings. Google saw its revenue double in its most recent quarter to $1.03 billion, primarily due to an increase in advertising. For more on this visit here