explain to viewers that don't know what are the hash tags. >> if you have seen them around the been, that number sign or pound sign next to a word or phrase, that's a hash tag. it's a way to organize information by topic. so if you use a hash tag in one of your posts, you are including that post in a larger global conversation around that topic. >> when will everybody start to be able to use the hash tags on facebook? i have not seen the ability yet. are they going to work the same way on twitter, where they consolidate a lot of information? >> yeah, similar to twitter, they are rolling out the hash tag feature in the upcoming weeks, and it's going to work in a similar way to twitter but you will be able to see posts that you are authorized to see. if you put a post up that only should be seen by your friends, only your friends will see that in your hash tag screen.