The ability of delivering analytical information and business metrics over a public network and present it on a functional mobile device (smartphone, netbook) by means of a user friendly graphical interface.
There are several advantages of using mobile BI such as the possibility to take earlier decisions due to the fact that you have a real time connection with your data. You can fulfill ad hoc needs during conversations with eg. customers or suppliers. Mobile BI users often use the traditional BI systems even more intensely. Additionally, from security point of view, mobile BI is often safer then when you are using spreadsheets or emailing reports.