I have to start with that I am not a big fan of Twitter . It is not like facebook and it seems to me that it is only for letting people know what you are doing in the last two minutes. Nowadays, it is conquered by a lot of famous people who do not know anyting about the world they live on. They are always fighting with each other and take people's attention to ridiculuos things so in my opinion it is not an area to be used in education, language teaching. Language teaching needs a calm area in which everyone can focus on language only. So far these are my opinions about Twitter. I know I am pessimistic about it but that's what I've observed until now.