every time when we change the tv channels,we will see various advertisements.although different people have different ideas about their advantages and disadvantages,i think advantages weigh more.the major advantage of advertising on tv lies in its convenience.it can save our time.we can know directly where we can get the goods we need.it's unnecessary for us to look for them from one shop to another.besides,it can also save our money.we can compare the similar products on tv and finally get the best and cheapest one without going out or traveling a long distance. what's more,it can deliver information about certain products faster than other media with its beautiful sounds and vivid pictures.from the above mentioned reasons,we can see that it's very convenient for us to know what products are available and how to get them with the help of advertising on tv.