Some are turning to the Internet, which is cheaper and offers concrete measurements like click-through rates— especially important at a time when marketing budgets are tight.

It helps advertisers to measure the click-through rates.

Interactive television advertising, which allows viewers to use their remote controls to click on advertisements, has been pushed for years.

Technology has cut out much of life's donkey work, and we have more freedoms than ever: we can wear what we like and communicate with hundreds of friends at once at the click of a mouse.