Medium is currently in the process of slowly rolling out a change that limits what Medium content is made available to third-party search engines, as well as Medium’s native search and tag pages. The overwhelming majority of content that Medium will no longer be allowing to be indexed is what most people would consider spam, and the net effect will be more traffic to quality content long-term.
This new system, similar to Google’s Page Rank, is based on a number of internal signals that help us determine if your use of Medium is above board. As the new system is being rolled out, it may take a little bit of time for you as a creator to become a trusted part of the Medium network and meet the threshold for being indexed, but if your stories meet our basic quality threshold, they will end up in external and native search indexes. We encourage you to continue publishing your best writing on Medium, engaging with other users by clapping, following, and responding, and becoming a part of the Medium community.