www.reddit.com<\/a>, or opened a Reddit application at least once during a trailing seven-day period. Average quarterly WAUq for a particular period is calculated by adding the number of WAUq on each day of that period and dividing that sum by the number of days in that period.<\/p>\n\nWe define average revenue per unique (\u201cARPU\u201d) as quarterly revenue in a given geography divided by the average DAUq in that geography. For the purposes of calculating ARPU, advertising revenue in a given geography is based on the geographic location in which advertising impressions are delivered, as this approximates revenue based on user activity, while other revenue in a given geography is based on the billing address of the customer.<\/p>\n
Use of Non-GAAP Financial Measures<\/b><\/p>\n
\nWe use certain non-GAAP financial measures to supplement our consolidated financial statements, which are presented in accordance with U.S. GAAP, to evaluate our core operating performance. These non-GAAP financial measures include Adjusted EBITDA, Adjusted EBITDA margin, Free Cash Flow, and Free Cash Flow margin. We use these non-GAAP financial measures to facilitate reviews of our operational performance and as a basis for strategic planning. By excluding certain items that are non-recurring or not reflective of the performance of our normal course of business, we believe that these non-GAAP financial measures provide meaningful supplemental information regarding our performance. Accordingly, we believe these non-GAAP financial measures are useful to investors and others because they allow investors to supplement their understanding of our financial trends and evaluate our ongoing and future performance in the same manner as management. However, there are a number of limitations related to the use of non-GAAP financial measures as they reflect the exercise of judgment by our management about which expenses are included or excluded in determining these non-GAAP measures. These non-GAAP measures should be considered in addition to, not as a substitute for or in isolation from, our financial results prepared in accordance with U.S. GAAP. Other companies, including companies in our industry, may calculate these non-GAAP financial measures differently or not at all, which reduces their usefulness as comparative measures.<\/p>\n
\nA reconciliation is provided below for each historical non-GAAP financial measure to the most directly comparable financial measure stated in accordance with U.S. GAAP. Reddit encourages investors to review the related U.S. GAAP financial measures and the reconciliation of these non-GAAP financial measures to their most directly comparable U.S. GAAP financial measures, and not to rely on any single financial measure to evaluate Reddit\u2019s business. We have not provided a reconciliation to the forward-looking GAAP equivalent measures for our non-GAAP guidance due to uncertainty regarding, and the potential variability of, reconciling items. Therefore, a reconciliation of these non-GAAP guidance measures to their corresponding GAAP guidance measures is not available without unreasonable effort.<\/p>\n
\nAdjusted EBITDA is defined as net income excluding interest (income) expense, net, income tax expense (benefit), depreciation and amortization, stock-based compensation expense and related taxes, other (income) expense, net, and certain other non-recurring or non-cash items impacting net income that we do not consider indicative of our ongoing business performance. Other (income) expense, net consists primarily of realized gains and losses on sales of marketable securities, foreign currency transaction gains and losses, and other income and expense that are not indicative of our core operating performance. Adjusted EBITDA margin is defined as Adjusted EBITDA divided by revenue. We consider the exclusion of certain non-recurring or non-cash items in calculating Adjusted EBITDA and Adjusted EBITDA margin to provide a useful measure for investors and others to evaluate our operating results in the same manner as management.<\/p>\n
\nFree Cash Flow represents net cash provided by (used in) operating activities less purchases of property and equipment. Free Cash Flow margin is defined as Free Cash Flow divided by revenue. We believe that Free Cash Flow is useful to investors as a liquidity measure because it measures our ability to generate or use cash. Once our business needs and obligations are met, cash can be used to maintain a strong balance sheet and invest in future growth. Additionally, we believe that Free Cash Flow is an important measure since we use third-party infrastructure partners to host our services and therefore we do not incur significant capital expenditures to support revenue generating activities.<\/p>\n
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