You should also remember to budget your bids. Do not go overbidding because you will only lose your money and do not go so low that your ads will never get the chance to show up. Check your profit against your spending. If you see no progress then most likely you have to drop your ad campaign.
More and more advertisers have been using PPC advertising and it will continue to grow faster than any online advertising techniques. From revenues of $2.6 billion in 2004 to $5.5 billion in 2009, cost per click will dramatically go up as well from $0.29 to $0.36.
PPC advertising is new in online marketing and it is going to continue in the years to come. For advertisers, this means increase revenues with fewer advertising expenses, savings, more sales, good return of investment (ROI) and effective ad campaigns in the days to come.