There is an old quote that says, “The best things in life are free”. While the original intention of the quote was probably a loftier one, it will appeal greatly to all those who want to advertise online.The number of sites for online advertising is as vast as the internet itself but every advertiser wants the same thing for his ads; visibility. For this purpose the advertiser has to decide on the type of advertisement and also the website, which will be ultimately responsible for promotion his advertisement receives.Online advertisements are of different types and the advertiser has to choose the one best suited for his product and the target.The most commonly identifiable one is the Search Engine Results Page. The list of web pages displayed in response to a search query will have a link above the Organic list (pages appearing according to relevance of the search) which looks like the list except for font and background color for differentiation. Alternatively the advertisement may be placed to the right of the page like a classified one.Another equally identifiable and more visually pleasing form is the Banner Advertisement. They are placed on webpages in the form of pictures, animation and videos with or without sound. Clicking on the banner takes one to the website advertised.Interactive Media responds to user action and presents content in various forms. A common type is virtual reality.Social Network Advertising is effective when a certain group is to be targeted. With the growing popularity of various social networking websites advertisements can be placed on them directly or based on your friends. Groups or Pages that users can join is another innovative method.Interstitial Advertising Webpages are advertisements that appear before or after the content the user wants to access. The advertiser should be careful using such a medium as the user is more likely to get frustrated if the content he is looking for is delayed by such advertisements.Email Marketing is a very direct form of advertising online. Most users check their emails regularly so advertisers can reach them to introduce new products to existing and new customers as well as maintaining customer relationship. While response to such advertisements can be tracked easily, such mails may be rejected or filtered and must not violate spam laws.Choosing websites for putting the free advertisement will ultimately determine the success of your advertisement. While it is true that most free advertising websites are actually ineffective the advertiser must follow the dictum ‘less is more’. Rather than advertising on all the websites one can find, in the hope of hitting the mark, the advertiser should carefully choose from a few top-listed and popular websites. There are several sites that continuously update list of websites for free advertising. Forums and blogs, many times attached to such sites, give an ample feedback from other online advertisers which can help any advertiser not only to avoid certain sites but also to find the websites best suited for their own purpose.Internet being a medium as limitless as the ocean, the right platform for your advertisement, like a solid ship shall bring you home.