Hashtags help group posts so people can find them more easily. They work best on Instagram because users often search and follow hashtags there. On Twitter and LinkedIn, fewer hashtags usually look cleaner and perform better. Facebook hashtags exist, but they do not drive strong results for most pages. The smart approach is to adjust hashtag use based on each platform. Using too many can distract readers from the message. Choosing a few clear and related hashtags is enough. Does hashtag use really change reach on each platform?