The "10-Year Challenge" is a social media trend where individuals post side-by-side photos of themselves taken ten years apart. This challenge highlights changes in appearance, lifestyle, and personal growth over the decade. It gained popularity on platforms like Facebook and Instagram, encouraging users to reflect on their journeys. Participants often use hashtags like #10YearChallenge to share their images and stories. The challenge not only fosters nostalgia but also promotes discussions about aging, self-improvement, and the impact of time on people's lives. It has sparked both lighthearted fun and deeper conversations about societal changes over the years.