Research consistently shows that while social media use does not enhance objective political knowledge, it increases users’ sense of being knowledgeable (subjective knowledge). However, it is unclear which specific modes of social media use lead users to an enhanced feeling of being knowledgeable. This work focuses on two factors that are believed to shape users’ subjective knowledge when using social technologies: (a) the intentionality of social media use (intentional vs. incidental news consumption) and (b) the relevance of the news content. In a pre-registered, two-wave experiment ( N = 921), participants were exposed to either personally relevant or non-relevant topics on social media, either intentionally or incidentally. The results indicated that while intentionality of exposure did not affect subjective knowledge, intentional news search improved objective knowledge more than incidental exposure. The latter can still facilitate objective knowledge and increase subjective knowledge, as long as the news is considered as highly relevant.