Granted, adding in a hashtag (#Android) now those tags will actually be clickable and link you into others conversing and using the same tag.
The new feature means Facebook users can now:
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Search for a specific hashtag from your search bar. For example, #Wimbledon2013, #FathersDay or #Wedding.
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Click on hashtags that originate on other services, such as Instagram.
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Compose posts directly from the hashtag feed and search results.
Not like hashtags are anything new to users of Twitter or Google+. Or hell, even Instagram, which Facebook acquired. It is still fun to watch a social netwrk that is still as large as Facebook be the last to adopt something that might seem trivial to some, but is a vital part of social networking.
Source: The Next Web