Twitter is a site where you can be updated. People who tweet whatever they are doing or feeling. Twitter is a place where you can find out what's going on throughout the world. In other words, you can use twitter to stalk people.
Pros
1. Great promoting platform
2. Get updated
3. Simple
4. Stay connected
5. Make new friends
Cons
1. Cyberbully
2. Time consuming
3. Addicting
4. False advertisement