根据短文内容和首字母的提示，填写所缺单词。

In the m____1___ world，advertising is everywhere! Some people think that ads are great．Others，h___2___ ads，saying that they make our cities and countryside look ugly．Many ads are a__3___ specifically at teenagers，and some young people see more than 100 advertisements a day．It’s true that some ads can be very useful! For instance，they can help you to compare two different products so that you can buy the o____4___ you really need．They can also help you s____5___ money．When prices are listed，you can go to the store with the l____6___ price．