Core Viewpoint - The article discusses the rising trend of nostalgia on the internet, particularly focusing on the 2000s, and how creators are leveraging this sentiment to engage audiences and generate content that resonates with collective memories [10][41]. Group 1: Nostalgia Trend - Nostalgia has become a significant cultural phenomenon, with various topics related to the 2000s accumulating over 10 billion views online, indicating a strong collective memory among audiences [10][28]. - Creators are tapping into nostalgic themes, such as "Dream-core," which combines surrealism and nostalgia, to evoke emotional responses from viewers [26][30]. - The trend is characterized by a shift from elaborate recreations of past styles to more accessible, everyday representations of nostalgia, making it easier for creators to participate [36][41]. Group 2: Content Creation and Engagement - The creator "小麻er" has successfully engaged audiences with a series of videos titled "Back to 2006," achieving significant viewership and interaction, with one video garnering over 121,000 likes [17][39]. - The use of AI technology in nostalgia-themed content, such as the creation of virtual cities, showcases innovative approaches to evoke memories while blending reality and fantasy [30]. - The article highlights the role of social media platforms in promoting nostalgic content, with specific hashtags and themes driving millions of views and interactions [38][41]. Group 3: Audience Demographics and Emotional Resonance - The primary audience for these nostalgic themes consists of individuals aged 24-30, who associate the millennium with their formative years and early explorations of adulthood [41]. - The collective nostalgia serves as a means for individuals to find emotional anchors and connect with others, creating a shared experience around past memories [41][42]. - The nostalgia trend reflects a longing for the perceived security and optimism of the past, particularly during economic upswings, highlighting a desire for a return to those feelings [42].