Cloudflare Radar's 2025 Year in Review highlights significant trends in internet traffic and technology. Internet connectivity continues to grow, driven by ongoing reliance on digital communication, commerce, and entertainment. The report notes a spike in global internet traffic that began mid-January, coinciding with the return to work and school after the New Year. Generative AI has surged, with Claude, Perplexity, and Gemini emerging as key competitors to ChatGPT. Social media dynamics have shifted too; while Facebook, Instagram, and TikTok remain dominant, Snapchat has surpassed X in user engagement. Google retains its top position in overall traffic rankings, with Instagram and YouTube climbing into the top ten. On the technical side, Cloudflare has been developing post-quantum cryptography since 2017, enabling better protection against advanced quantum attacks. By late 2022, they made post-quantum key agreements default across their network, leading to increased browser support. AI bots are a focal point in 2025, driving traffic for various purposes, including training large language models and enhancing search capabilities. The report tracks their activity, noting that not all bots follow content owner guidelines, leading to controversy over their crawling practices. In mobile operating systems, Android dominates in certain regions with a peak traffic share of 97%, while iOS reaches up to 70% in others. Traffic analysis reveals that HTTP/3 is gaining traction as the latest web protocol, which improves connection speed and security. Overall, this review provides a comprehensive view of evolving internet behaviors and technologies in 2025.