In the 21st century, with an intensely competitive consumer market, advertisers increasingly used digital technology to call greater attention to products. In 2009, for example, the world's first video advertisements to be embedded in a print publication appeared in Entertainment Weekly magazine. The thin battery-powered screen implanted in the page could store up to 40 minutes of video via chip technology and automatically began to play when the reader opened the page. There is no dispute over the power of advertising to inform consumers of what products are available. In a free-market economy effective advertising is essential to a company's survival, for unless consumers know about a company's product they are unlikely to buy it. In criticism of advertising it has been argued that the consumer must pay for the cost of advertising in the form of higher prices for goods; against this point it is argued that advertising enables goods to be mass marketed, thereby bringing prices down. It has been argued that the cost of major advertising campaigns is such that few firms can afford them, thus helping these firms to dominate the market; on the other hand, whereas smaller firms may not be able to compete with larger ones at a national level, advertising at the local level or online enables them to hold their own. Can you summarize this article?