Social media has become a vital part of daily life, especially for younger generations. Platforms like Instagram, Facebook, and YouTube play a significant role, with reels and short videos attracting a lot of attention. While these formats encourage creativity and fun, they also raise concerns about their negative effects on behavior and concentration. This is particularly true in Bangladesh, where social media use among young people is rapidly increasing. This research investigates the harmful effects of social media on young individuals, focusing on how it affects their behavior and reduces concentration due to excessive consumption of reels and short videos. Data was collected through an online survey of individuals aged 18 to 30, examining social media usage patterns, reel consumption, and self-reported changes in concentration and behavior. Responses from 100 participants were analyzed to identify trends and correlations. The study is expected to reveal significant declines in concentration levels, shorter attention spans, increased procrastination, and behavioral changes such as reduced motivation and mood swings. Although reels may have some minor positive effects, the findings will highlight their overall negative impact on young people's productivity. This research emphasizes the importance of using social media mindfully to lessen these adverse effects and advocates for a balanced approach to digital engagement to promote healthier habits and protect the concentration and behavior of young individuals.