| Ever since the advent of Internet, advertising on the World Wide Web
has been very popular. Many corporations, companies and business have
taken advantage of this and you can see ads on any web pages you visit.
Consumer can go to any search engine and type the keyword relating to
what they are looking for and hit search and they will be provided with
a huge list from which they can select. This is a very cost effective
and time saving method of advertising.
It has become really easy
for any business to have a personalized website by which they can
advertise, directly interact with the customer; provide details about
their product and services. Regular newsletters, offers, discounts can
be pasted onsite to increase the interest of the website visitors.
Since it's easy to reach any kind of audience concerning any kind of
business, the possibility of misuse is always there. Based on thisInternet advertising is classified
into two kinds of advertisement, legal online advertising and illegal
online advertising. Legal online advertising includes online
advertising directories, search engine advertising, e-mail advertising,
and desktop advertising. Illegal advertising is more commonly know as
spamming. This is usually done by altering some system settings with
the help of external applications after which pop-ups are sent to a
particular network or computer. The external applications are known as
adware or spyware. Some of these are really harmful, the most famous
being Trojans, which are very hard to uninstall and remove from the
system. | 
