Click on the Retweets tab at the top of the page.
Edited:
When you're on your desktop, check the Notifications tab on the upper left corner.
When you're on your smartphone, check the Notifications tab, which is the second icon, on the header navigation.
You'll see your mentions if you click on your username
or you could click on your @username and you'll see people who sent you messages
You don't know. If you have a protected account you can choose the people who you want to follow you.
There is no way of knowing when someone is online on Twitter.
It expands the tweets to show you if anyone replies to them, and who favorites and retweets them.
The only way you would receive these tweets is if they are retweets or if you are following them.
The only thing that changes when you change your Twitter name is the name at the top of the tweet. The content of your tweets and the number of retweets/favorites stays the same.
You can't see who retweeted you on certain applications, such as Tweetdeck for iPhone and such. However, on web, you go to your homepage, and below the bar where you enter your tweets is a bar that has Home, Mentions, Retweets, Searches and Lists. Click on the Retweets button, a menu will drop and click Your Tweets, Retweeted. Click on the tweet to see who retweeted said tweet. Sometimes you cannot see who retweeted it because the person has a private profile and you're not following him/her.
The expand button lets you know more information about a certain tweet - by pressing it, you may see how many retweets and likes there are on that specific post.
If you are trying to get more retweets, consider using these favorable words/phrases.
If someone that DOES follow you retweets you and someone sees that tweet on their TL they will RT you.. and they don't have to be following you... Follow me @ALexisU_
Phone them? Text them? Write them a letter? Facebook? Twitter? Hotmail? etc
It is an iPhone app that lets you check Twitter.
For the purposes of Twitter, the best username is something short. Why? Twitter's 140-character limit. The shorter your name is, the less characters will be spent on addressing you if someone @replies or retweets you, and the more characters will be spent on valuable information. This means that people will be more likely to @reply or retweet you, and you'll become more popular on Twitter. Great. If you are asking about choosing a twitter username for you,it is impossible until you give your name.
Check the twitter star pages!
You should check on Twitter.