It is important to determine whether the keyword will likely result in sales or not before you bid on that keyword and later found out that you just wasted your money on poor PPC campaigns.There is no easy way to determine the commercial value of a certain keyword, but Microsoft Ad Center Labs has produced a valuable tool to help you accomplish this. All you have to do is enter your keyword in the search box and it will calculate for you the projected success of your keyword. This program specifically calculates keywords with commercial intent and can be of great value to you and your ad campaign.
So take the time to try out a few different keywords. Don't just focus on finding keywords with higher search volumes but also consider the commercial intention that a keyword phrase may have.