he said it gets worse. >> rose: dick costolo of twitter and bill browder when we continue. funding for charlie rose was prodethd by e following. b >> additional funding if provided by these funders. >> additional funding is provided by these funders. >> and by bloomberg, a provider of multimedia news and information services worldwide. captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: dick costolo is here, he is ceo of twitter social networking service has now grown to 140 million active users who tweet over 340 million times a day. hhe has led the company successful mobile strategy, an area that competitors such as facebook continue to find elusive, twitter has had a wind ranging impact on events around the globe, last year it gave voice to the millions of arab spring protesters organizing rebellions across the middle east, earlier today twitter revealed a new revamped home page and pleased to have him at this table for the first time. welcome. >> thanks for having me, i love what you have done with the new set he

julie sat down with dick costolo.stand a key topic you asked about was twitter's advantage over its peers and being a mobile first company. >> that's right, melissa. when i asked how twitter's ads compared to facebook's ads, ceo dick costolo said that twitter was the first ad platform designed from the ground up to work everywhere, mobile tablets and of course the web. i asked him whether the company's two ad products promoted tweets and trends are enough to grow the business. >> the short answer is yes. we think that the ad platform as it is today with some capabilities that will allow self-serve advertisers to use the platform more easily is the scaleable model that will do everything we need to do for business. >> is there an inherent conflict between serving your users and serving your advertising partners? >> no. and the reason for that is we don't charge advertisers for displaying the ads. the advertiser only gets charged if the user interacts with the ad. click on the link in the ad, they retweet the tweet, the

julia borsten is sitting down with dick costolo on "squawk box" later today.s on "squawk box" u.s., 8:00 a.m. eastern today. >>> if you want to join the conversation here on "worldwide exchange," speaking of twitter, you can always get in touch with us. tweet us at cnbcwex. ross? >> don't miss out on all of that. >>> yahoo!'s new ceo sees yahoo! as a company that will excel at personal information. she's outlined her plans for the falling internet company's future. kara swisher said that the plans were very broad, but noted mayer made a point that her number one priority is to make yahoo! part of a user's everyday routine. she said there was an increasing focus on shifting to mobile. >>> at facebook, the fallout continues. around 50 lawsuits have been filed against the social media giant. the underwriters of the flotation. in addition, securities lawyers representing facebook investors say they expect hundreds of arbitration claims to be launchlaunch ed against brokers. facebook shares is still down more than 45% since the may 18th ipo. >>> asprecia -- >> cont

. ♪ >>> this wednesday a rare interview with twitter ceo dick costolo.to hear from him? his answers to questions will air on wednesday on cn

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. >>> tomorrow on cnbc, don't miss a rare interview with twitter ceo dick costolo.estions today using #asktwitter. his answers will air tomorrow on cnbc and cnbc.com. take a look at the day on wall street. it was a tough day today. we had the protesting happening in spain. we had worries about earnings for the third quarter because the quarter ends this week. and it all relates in a triple digit loss for the dow industrials. nasdaq gave up 43 points and the s&p 500 down 15. that will do it for me on the "closing bell." i hope you'll follow me on twitter and on google plus. stay right there because "fast money" is up next.