This study reexamines the relationship between consumer engagement and brand loyalty by integrating behavioral, cognitive, emotional, and social dimensions. Adopting a holistic and consumer-centric perspective, the research underscores that both visible actions (likes, shares, comments) and latent psychological states (emotional attachment, cognitive involvement) contribute significantly to the development of brand loyalty in digital environments. To empirically validate this relationship, a meta-analysis of 32 empirical studies was conducted, using Structural Equation Modelling (SEM) to synthesize effect sizes. The results reveal a strong and statistically significant positive correlation between consumer engagement and brand loyalty (μ = 0.3756, 95% CI: 0.2883–0.4629), despite substantial heterogeneity across studies (I2 = 96.6%). These findings suggest that increasing consumer engagement, regardless of its form, has a consistent and measurable impact on brand loyalty.