The reason why advertising on the internet is more profitable nowadays is because more people spend their time surfing the web. What is more, it is easier to find target audience, to say nothing of the fact that there are lots of specific tools to help you do that.
What should also be mentioned in this respect is that not that many people watch TV nowadays. Besides, a lot of kids watch TV which means that advertising influences them but they are not able to purchase those goods which are advertized.
Apart from that, finding what you need takes seconds on the internet as you only task is simply to google it and you will most likely come across the website of the product or service you have been looking for. Then, you will quickly realize how easy it is to order the thing you need and soon enough it will be on its way to your home. So, the internet definitely seems to be the better place for advertising campaigns.