1. A computer-implemented method for positioning target sponsored content on a cellular phone, the method comprising the steps of: assessing a likelihood of an interaction by a user of the cellular phone with a sponsored content to be presented to the cellular phone, wherein the assessment is based on: a prior interaction by the user of the cellular phone with content related to the sponsored content; and a plurality of user characteristics associated with the cellular phone, wherein the plurality of user characteristics includes: a demographic associated with the user; and at least one previous web interaction of the user using the cellular phone, wherein the at least one web interaction includes the type of content of a web site accessed by the user via the cellular phone; and a present location of the user; and a predefined hardware or software characteristic of the mobile cellular phone; prioritizing the placement of the sponsored content within one of a plurality of predefined areas of a graphical user interface of the cellular phone over the placement of other sponsored content within the same area, wherein the prioritization is based on the assessment of the likelihood of the interaction of the user of the cellular phone with the sponsored content; and presenting the sponsored content within the one of a plurality of predefined areas of the graphical user interface of the cellular phone.