Thanks, Bill, and good afternoon, everyone. Today, I will be discussing our full year and fourth quarter 2025 financial results and provide an update on our first quarter 2026 outlook. All financial metrics, except for revenue, will be discussed in non-GAAP terms unless otherwise specified, and all comparisons will be discussed on a year-over-year basis unless otherwise noted. I will start with our fourth quarter results. We ended the quarter with 619,000,000 global monthly active users, or MAUs, growing 12%, our tenth consecutive quarter of record high users. We continue to demonstrate user growth across all of our geographic regions. In Q4, our US and Canada region had 105,000,000 MAUs, growing 4%. Our Europe region had 158,000,000 MAUs, growing 9%. And in the rest of world markets, we had 356,000,000 MAUs, growing 16%. Moving to revenue. In Q4, our global revenue was $1,319,000,000, up 14% year over year, or 13% on a constant currency basis. We saw strength from our conversion objective. Across verticals, growth was driven by retail, though with puts and takes within that as we have described, and driven by smaller but faster-growing categories on our platform, including financial services and telecom. Turning to our geographical breakouts for Q4. Revenue in the US and Canada was $979,000,000, growing 9%. Growth came from retail, financial services, and telecom. In Europe, revenue was $245,000,000, growing 25% on a reported basis or 18% on a constant currency basis. Growth in Europe was driven by retail but was lower than our expectations. We saw a second-order effect on cross-border spend from certain large global retailers who pulled back ad spend in Europe, as well as UCAN, as they recalibrated across their global portfolio due to the same tariff and margin pressure as Bill described earlier. Revenue from Rest of World was $96,000,000, growing 64% on a reported and constant currency basis. In Q4, overall ad impressions grew 41% while ad pricing declined 19% year over year, driven primarily by the continued mix shift impacts from growing ad impressions in under-monetized international markets. Moving to expenses. In Q4, cost of revenue was $221,000,000, up 15% year over year and up 7% versus Q3 due to increased infrastructure spend related to our user and engagement growth. Our non-GAAP operating expenses were $562,000,000, up 13%. The increase was driven by headcount investments in marketing and R&D as we continue to invest in AI initiatives and grow our sales force. Within G&A, expenses grew at a higher than typical rate year over year, primarily due to certain legal costs not expected to repeat, as well as lapping certain insurance proceeds received in the prior year. In Q4, we delivered adjusted EBITDA of $542,000,000, with an adjusted EBITDA margin of 41%, up 20 basis points versus Q4 last year. For the full year 2025, free cash flow increased 33% to $1,250,000,000. This compares to 2025 adjusted EBITDA of $1,270,000,000, representing free cash flow conversion of 99%. Our ability to generate significant free cash speaks to the inherent profitability of our business and asset-light nature of our model. Investors should continue to analyze our free cash flow annually as quarterly free cash flow can fluctuate due to the typical seasonality of our business. We ended the year with cash, cash equivalents, and marketable securities of $2,500,000,000. We made further progress mitigating dilution in Q4 as we deployed $500,000,000 towards share repurchases, bringing our full year 2025 share repurchases to $927,000,000, a total of 30,000,000 shares. In addition, we utilized $399,000,000 of cash in the year on net share settlement of equity awards. Combined, for full year 2025, these actions have driven an approximately 1.6% decline in year-over-year fully diluted share count, which compares favorably to our stated positive 2% to 3% average annual target. Now I will discuss our guidance for the first quarter, which does not include any impact from TV Scientific as we await regulatory approval for closing of that transaction. We expect Q1 revenue to be in the range of $951,000,000 to $971,000,000, representing 11% to 14% growth year over year. Based on current spot rates, our guidance assumes the impact of foreign exchange to be approximately three points of tailwind in Q1. For the first quarter, we expect adjusted EBITDA to be in the range of $166,000,000 to $186,000,000. We anticipate Q1 2026 non-GAAP cost of revenue to grow sequentially from Q4 2025 by low single-digit percent. In Q1, within non-GAAP operating expense, we will focus our investments on our sales transformation and additional R&D hiring to support our AI efforts. Next, I want to share some color about the trajectory of margins throughout the year. Starting with cost of revenue. In 2026, we are making deliberate investments in high-ROI areas, such as GPU capacity to enable key AI initiatives. These investments will allow us to train and serve visual foundation models and our conversation models that advance our capabilities in multimodal search and discovery, as well as Pinterest Assistant. In addition, we will continue to build more powerful AI models that are enhancing full funnel ROAS for our advertisers and ads relevance for our users. We also have been signaling for some time that we have captured much of the benefit from our multiyear infrastructure cost optimization efforts and are now reaching diminishing returns. As a result, we expect modest headwinds from cost of revenue as a percentage of revenue in 2026. That said, we are acting decisively to free up investment capacity elsewhere within the company. In January, we announced a restructuring, including a series of organizational changes to simplify how we operate, reduce layers, and increase efficiency so that we can invest more intentionally in the areas that matter most, especially AI and our go-to-market transformation. The result of these offsetting dynamics is that we expect adjusted EBITDA margins to be roughly in line with 2025. So while we anticipate year-over-year adjusted EBITDA margin pressure in the first half, based on our current outlook, we expect full year 2026 adjusted EBITDA margin to be roughly in line with 2025 at approximately 30%. While the acquisition of TV Scientific has not yet closed, we do expect closing to happen in Q1 or Q2, which we anticipate would cause a roughly 100 basis point drag to adjusted EBITDA margin in 2026, leading to 29% for 2026 overall on a combined basis. To illustrate the potential revenue impact of the acquisition, I will also share that we estimate TV Scientific's Q4 2025 revenue would have contributed less than two points of growth to Pinterest revenue in Q4 2025. Stepping back, over the last two years, we have made meaningful progress toward our long-term margin goals. Adjusted EBITDA margins expanded by nearly 700 basis points from 2023, reaching 30% in 2025, reflecting both operating discipline as well as the inherent profitability of our model as we have scaled. Our margin outlook for 2026 reflects our decision to lean into the high-ROI investment opportunities we see for ourselves in this crucial moment and to capture the full opportunity ahead. However, our fundamental view of the profit potential of the business is unchanged, and we therefore still expect to achieve our adjusted EBITDA margin targets of 30% to 34% over the medium term. Given the strength of our user and supply dynamics, and the organizational actions we are taking to strengthen our sales and go-to-market efforts, we believe our revenue growth should be higher over time, and we continue to have conviction in our ability to reach our long-term targets. We are making the right decisions today to emerge from this period better positioned to compete for the large and growing opportunity ahead. With that, I will hand it over to Bill for some final words.