The earliest forms of graffiti date back 30,000 B.C.E in the form of cave paintings and they were painted in caves all over the world. Today, graffiti has developed very much. Some of the most common styles of graffiti have their own names. A "tag" is the most basic writing of an artist's name, it is simply a handwriting.
Last month an exhibition took place in Heraklion, on a very big wall close to my neighbourhood. Artists from all the Heraklion went there and painted lots of beautiful graffiti. Some of my friends and I painted our own graffiti. All of the graffiti was wonderful, and I always enjoy it when I see that wall.
However, sometimes graffiti can be annoying and also very offensive. Artists very often paint their graffiti on private property which is very annoying. Graffiti can also be very insulting because fans of football teams insult other football teams by painting graffiti.
Despite these objections, I like this hobby and I will keep painting graffiti in the future. I am sure it will continue in the future, and I think graffiti will develop very much.