How can you mute specific topics, keywords, or content types?

Reddit's native content filtering capabilities are more limited than many users expect, particularly when compared to platforms that offer robust keyword-based filtering. The platform's primary content control tool is community muting, which is available at the community level rather than the keyword level. To mute a community, go to the subreddit page and click the overflow menu (three dots) on desktop or the equivalent on mobile, then select "Mute r/communityname." Muting prevents posts from that community from appearing in your Home feed and in recommendations, even if you receive modmail notifications from it. This is the recommended approach for blocking content from specific sources rather than blocking topics across the entire platform. Reddit does not offer a native keyword-based mute or block filter in its standard interface. If you want to suppress posts mentioning certain words or topics, third-party tools are currently the practical solution. Browser extensions like RES (Reddit Enhancement Suite) on desktop have historically included keyword filtering that hides posts whose titles contain specified terms. As mentioned in r/help discussions, third-party apps like ABE for Reddit provide keyword-based title filtering specifically designed to improve this gap in Reddit's native capabilities. On the recommendation side, Reddit's own interface offers "Show fewer posts like this" in the overflow menu of any post — clicking this sends a negative signal to the recommendation algorithm for that content type, community, or topic cluster. Over time, consistently using this option on unwanted content categories nudges the Home feed away from that material, though it is a probabilistic influence rather than a hard block. For NSFW content filtering specifically, Reddit provides a dedicated toggle in Settings under the Content section — disabling "Show mature content" prevents NSFW-tagged posts from appearing anywhere in your feeds and search results, and this control is both reliable and account-wide.