A major consideration in constructing media schedules is timing. The advertiser's main is to place the advertisement as close as practical to the point where consumers make their purchase decision. For example, an advertiser who knows that a grocery buyer does a main shop on Saturday afternoons and a top-up shop on Wednesday nights, may consider TV to achieve general brand awareness, supplemented with radio spots to reach the shopper while he or she is driving to the supermarket or regular place of purchase on the days when the majority of consumers carry out their shopping.