start using hash tags just like twitter. i guess we kind of new this was coming. first, explain to viewers who don't know what are the hash that number sign or pound sign, that's a hash tag and it's essentially a way to organize information by topics, so if you use one in one of your post, you are including that in a larger global conversation around that topic. >> when will everybody start to use these on facebook? i haven't seen the ability yet and are they going to really work the same way on twitter where you can really consolidate a will the of mag informatio. >> they're rolling out the feature within the coming weeks. they like to do this slowly and in phases. and it is going to work in a similar way to twitter, although you're only going to be able to see posts you're authorized to