The growth bottleneck of social platforms often hinges on user stickiness. X platform product lead Nikita Bier recently revealed that the team has focused on refining the interest matching engine over the past six months, enabling new users to discover and engage with relevant content more quickly. This sounds simple, but in reality, it is one of the most challenging aspects of social applications—how to provide high-quality personalized feeds to strangers in the early stages, which directly impacts subsequent retention and activity. From a product perspective, this continuous optimization reflects the platform's pragmatic attitude in competition.