15. More Tweet-speak RT stands for RE-Tweet, forwarding on or cross posting a tweet you think should get more attention or notice.
16. More Tweet-speak # before a topic is called a hashtag and this is one of the greatest functions added by users to twitter. You can use searchtwitter.com to follow a topic and see what people are saying. Also to find people around that topic are you want to follow Ex. #sxswi or last weekend #tbarcamp