Call it online advertising, or online marketing or Internet advertising or web advertising; call it what you will, if you don’t know what it is, you will by the end of this video. Patrick Holmes, Instapage Paid Marketing Manager, defines and explains.So what, exactly is online advertising? For starters it’s one of the most effective ways for businesses of all sizes to expand their reach and find new customers. It can take many forms, from online display advertising and in-app ads to PPC and paid social. Bottom line: Online advertising has helped thousands, possibly millions by now, of businesses grow by leveraging the power of paid search and paid social advertising.