Twitter is a type of Social Media Marketing. Also called as online store. Here we can follow all the famous people, celebrity. Twitter is a micro blogging and social network. here anyone can share his feelings and thoughts it is very active social site.
The content on twitter is just amazing. it is very genuine website in social media. Service and support in twitter is great they will reply you in one or two days.
only the limitation in twitter that your content are not more than 140 words. Design and usability is good. I only say that it is above average in loading time it work perfectly on 3G only. it is simple and usefull for any novice user. userfrienly with new user. anyone can get it.
Twitter is a nice way to debet on issue of ethical as well as social.