You can't.
There is no way of knowing who has visited your profile/read your tweets.
You can't unless they are tweeting and their tweets show up on your timeline .
There's no way to know who has viewed you on Twitter. However, you can set-up your page as "private" to protect your tweets.
You cannot tell who is looking at your profile on Twitter unless you have protected tweets and you approve who can and can't see it. Thus, you can't be traced and will remain anonymous.
It will tell you underneath the retweet.
If your profile is not protected then anyone can see your tweets.For your tweets to appear on their feed, they must be following you. It doesn't matter if you are following them or not, they must be following you.If they are not following you but your account isn't protected then they can simply go to your profile to see your tweets.
Twitter is more or less like a micro-blog . You need to tell whatever you wanna tell in 140 characters . After you sign up in twitter, you can find a 'What are you doing?' box on top of your page . You can update whatever you want there . The tweets that you send will reach the twitter page of everyone who follows you . Similarly your page will consist of updates from the people you follow .
Generally people cannot tell who has been looking at their Twitter site. However, depending on how you reached their site they may be able to. Did you go directly to Twitter and find the specific user, or did you click an external link to reach their page? If you clicked a link to get there, they may have used a link cloaking service such as bit.ly or another that has an analytics function. If they did, some information may appear such as the page you came from what else you clicked and so forth. There are services that will even identify the IP address the user came from. Itshrunk.com does provide IP addresses. If the person in question does and Ip Address look-up, they may be able to track you as a visitor.
yes, he has his own website that has merchandise-- www.justinbiebermusic.com
No this is not possible.
Most likely, Twitter updates are available to be viewed by people on the Twitter Home Page. It is hard to tell what Twitter will do next, as far as new features and such.
No.