Even though influencer marketing is growing fast in many countries, we still don’t know much about how it affects young people in Nigeria. This study looks at how social media influencers affect trust, how people see brands, and how they decide what to buy—especially among Nigerian youths aged 18 to 40. I used a qualitative research method and talked to 15 young Nigerians who regularly watch or follow influencers on platforms like TikTok, Instagram, X (previously Twitter), and YouTube. After studying their answers, I found three main ideas: (1) trust and how real the influencer seems, (2) how young people react to what influencers say or promote, and (3) awareness that influencers are doing paid work. The study shows that influencers work well because young people feel connected to them and believe in what they say, which sometimes leads to quick buying decisions. Many see influencers as people who know a lot about fashion or lifestyle, especially when their content is consistent and nice to look at. Still, some people are starting to doubt influencers who seem too focused on selling things. This shows that Nigerian youths are becoming more aware of digital marketing tricks. This research helps marketers and policymakers understand how influencer marketing works in Nigeria and why honesty, cultural connection, and trust are very important.