Social media greatly influences health and fitness behavior by serving as a platform for sharing fitness successes, challenges, and expert advice. It can motivate individuals through community engagement and accountability, while also promoting healthy lifestyles. However, it can also lead to unrealistic expectations and self-comparison. Certain platforms foster trends such as fitness challenges or nutrition fads, which may positively or negatively affect behaviors. Influencers might encourage physical activity and healthy eating, but discerning credible information from misinformation is crucial for fostering an effective health behavior change.