Online advertising is a marketing strategy that involves the use of the internet as a medium to obtain website traffic and target and deliver marketing messages to the right customer.Broadly, online advertising is about delivering advertising to internet or online users via web sites, email, ad supporters software and internet enable smart phones. Online advertisement is any type of marketing message which gives information with the help of Internet. That means it could appear in a web browser, search engine, social media, media device and even in e mail.