Purpose: This study aims to examine how the clickbait headlines influence the perceived source credibility, subjective norm, perceived benefit and purchasing intention of customers on social commerce through social media platforms in different interpersonal relationship strength scenarios. Design/methodology/approach: A total of three studies were employed online to test the hypotheses. Study 1 used a single-factor, two-condition (clickbait: yes vs no) between-subject design. Both study 2 and study 3 employed a 2 (clickbait: yes vs no) × 2 (relationships: close friend vs stranger) between-subject design. All data were sourced randomly from 729 respondents in China. Data and models were analyzed by using SPSS and Mplus. Findings: Study 1 illustrated that clickbait has a negative effect on perceived credibility and purchase intention, and the perceived credibility mediated the relationship between clickbait and purchase intention. Study 2 replicated such finding and demonstrated that the interpersonal relationship strength interacts with the influence from clickbait to purchase intention. Study 3 enhanced the mechanism of source credibility found in the above studies and further revealed that perceived benefit and perceived norm had a mediating role in the purchase-making process online. Originality/value: Research efforts to date concentrate on how to detect and reduce clickbait headlines. This paper adopts a different perspective, considering the consequences of clickbait in the marketing domain. This study reveals the effects of clickbait on purchase intention and the mechanism behind this process under different scenarios.