What is addiction – Addiction is the continued use of a substance or act despite being harmful to the individual and it is beyond habit. There are many types of addiction and addiction to nicotine (tobacco), alcohol, drugs, volatile substance, gambling and caffeine are among the most common ones. Social and environmental factors play a role in the development of the addiction. The individiual might start something to try it out and later uses it for socializing purposes which continues as abuse and the individual becomes addicted to that object.