Cloudflare Radar's 2025 Year in Review highlights significant trends in internet traffic, AI usage, and technology adoption. Internet connectivity continues to grow, reflecting our increasing dependence on online communication, commerce, and entertainment. The report notes a normalization of traffic patterns starting in mid-January, post-holidays, which is essential for understanding these trends. Generative AI saw rapid advancements, with Claude, Perplexity, and Gemini emerging as strong competitors to ChatGPT. In social media, Snapchat has surpassed X, while Roblox maintains its dominance in the metaverse. Google remains the top-ranking service overall, with Instagram and YouTube climbing the charts in popularity. The article also addresses the rise of post-quantum encryption, which aims to secure data against future quantum computing threats. Cloudflare has implemented this technology by default on its network, contingent on browser support. In terms of mobile operating systems, Android and iOS dominate the market, with Android peaking at a 97% traffic share in some regions. The report analyzes HTTP versions, revealing the growing adoption of HTTP/3, which enhances speed and security. Finally, it examines website technologies across the top 5,000 domains, providing insights into the frameworks and tools driving modern web development.