companies should give more importance in the quality of their products
Essay does not ask what should companies do? I think you need to answer this question accordingly.
Majority of buyers is price conscious; therefore advertisements try to hit weaker side of their prospective customers. For example, mobile phone is one of the major flourishing businesses in Pakistan, and everyday companies offer new packages at competitive price in a bid to attract more customers. They lure mobile users to activate their unused sims with a reward to double their minutes on first top-up. In contrast, there are hardly any commercials promising quality of service or money back if users are not satisfied with company's network. This clearly shows that focus of adverts is quantity, and not the quality.
In todays' age of recession and inflation people prefer to buy at low price, a mind process, many companies take advantage of. For example, it is commonly observed that shoppers prefer to buy at TESCO than Sainsbury and Primark than Marks and Spencer. One common argument, at the price of one shirt in Marks and Spencer, one can buy three shirts in Primark. This promotes the trend to prefer quantity over quality, and this pattern is exploited by sellers in their promotions. Hence, advertisements promote quantitative over qualitative buying.