Online Advertising may be in any form. A banner ad campaigns campaign, a classified ad, a online community ad, a PPC ad, e-mail marketing etc. all these are categorized under web marketing. Banner advertising is even so the most commonly adopted means of online promotion among brand owners and advertisers. https://canvas.instructure.com/eportfolios/3073046/Home/Online_Advertising__A_Profitable_Means_of_Promotion_