Possibly the biggest form of new media is the internet. Advertising on the internet gives agencies the chance to reach a larger demographic than other media forms. And you can reach specialised groups more accurately, for example if you wanted to reach 15-25 year olds the perfect place to advertise would be Facebook.
Another form of new media advertising that has emerged in recent years is viral videos. These have only really come about since the creation of video sites such as Youtube and Vimeo, in which a database of videos can be stored and accessed at any time. Viral videos consist of some sort of stunt or event that indirectly relates to a product. The way they are spread is through word of mouth. These are a very affective way of advertising as they can gain cult status if good enough and cost less than if you were to make an advert for tv and pay for placement. With virals you can also reach a much larger audience, with some videos reaching 20 million hits.