The evolution of the Internet has connected people worldwide through various social media applications (i.e. Facebook, Instagram). One of which is the trending and controversial social media platform known for its short-form content, TikTok. Additionally, social capital theory pertains to a person's capacity to acquire benefits and valuable goods through meaningful social relationships and group affiliations. This quantitative study explores how the emergence of TikTok impacts social capital theory among young adults. The respondents were 18 to 25-year-olds who use TikTok (N = 490). The findings demonstrate that TikTok cultivates trust in content creators' authenticity and credibility, fostering meaningful interactions and communication dynamics among users. Interactions on TikTok, including likes, comments, and shares, serve as expressions of social support. Users engage actively by creating and sharing short videos, participating in trends and challenges, and directly interacting with content creators. This research contributes to our understanding of digital social interactions and highlights the importance of tailored engagement strategies to enhance social capital in online environments.