80% of radio advertisements are heard in the home; the wrong place, at the wrong time.

Short life span; unless it is a very catchy jingle on the radio, most people forget about radio advertisements immediately.

Cost fluctuation; the problem with radio advertising is that the cost can fluctuate depending on the time slot selected.

It can be difficult to reach some target audiences who simply do not listen to the radio.

Advertisement clutter can be high and annoying!

Radio can effectively sell only one idea at a time.