Effective Q1 2012, the Company began reporting Adjusted EBITDA instead of Adjusted OIBDA. While the dollar value of each measure is the same, a comparison of the historical reconciliation of both measures is provided in our supplemental financial schedules posted on the investor relations section of our corporate website at http://ir.demandmedia.com. The non-GAAP financial measures presented in this release are the primary measures used by the Company's management and board of directors to understand and evaluate its financial performance and operating trends, including period to period comparisons, to prepare and approve its annual budget and to develop short and long term operational plans. Additionally, Adjusted EBITDA is the primary measure used by the compensation committee of the Company's board of directors to establish the funding targets for and fund its annual bonus pool for the Company's employees and executives. We believe our presented non-GAAP financial measures are useful to investors both because (1) they allow for greater transparency with respect to key metrics used by management in its financial and operational decision-making and (2) management frequently uses them in its discussions with investors, commercial bankers, securities analysts and other users of its financial statements.
Revenue ex-TAC is defined by the Company as GAAP revenue less traffic acquisition costs (“TAC”). TAC comprises the portion of Content & Media GAAP revenue shared with the Company's network customers. Management believes that Revenue ex-TAC is a meaningful measure of operating performance because it is frequently used for internal managerial purposes and helps facilitate a more complete period-to-period understanding of factors and trends affecting the Company's underlying revenue performance of its Content & Media service offering.
Adjusted earnings before interest, taxes, depreciation and amortization (“Adjusted EBITDA”) is defined by the Company as net income (loss) before income tax expense, other income (expense), interest expense (income), depreciation, amortization, stock-based compensation, as well as the financial impact of acquisition and realignment costs, the formation expenses directly related to its gTLD initiative, and any gains or losses on certain asset sales or dispositions. Acquisition and realignment costs include such items, when applicable, as (1) non-cash GAAP purchase accounting adjustments for certain deferred revenue and costs, (2) legal, accounting and other professional fees directly attributable to acquisition activity, and (3) employee severance payments attributable to acquisition or corporate realignment activities. Management does not consider these expenses to be indicative of the Company's ongoing operating results or future outlook.
Management believes that these non-GAAP financial measures reflect the Company's business in a manner that allows for meaningful period to period comparisons and analysis of trends. In particular, the exclusion of certain expenses in calculating Adjusted EBITDA can provide a useful measure for period to period comparisons of the Company's underlying recurring revenue and operating costs, which is focused more closely on the current costs necessary to utilize previously acquired long-lived assets. In addition, management believes that it can be useful to exclude certain non-cash charges because the amount of such expenses is the result of long-term investment decisions in previous periods rather than day-to-day operating decisions. For example, due to the long-lived nature of a majority of its media content, the revenue generated by the Company's media content assets in a given period bears little relationship to the amount of its investment in media content in that same period. Accordingly, management believes that content acquisition costs represent a discretionary long-term capital investment decision undertaken at a point in time. This investment decision is clearly distinguishable from other ongoing business activities, and its discretionary nature and long-term impact differentiate it from specific period transactions, decisions regarding day-to-day operations, and activities that would have an immediate impact on operating or financial performance if materially changed, deferred or terminated.