So why are your expenses still greater than your profits?
A failed AdWords campaign can be blamed on a variety of causes. The most common cause for a failed well set up campaign is improperly chosen keywords.
The proper choice of keywords is the foundation of your entire strategy here. If your keywords do not reach your proper target audience you are going to find yourself either without visitors to your website or paying hundreds of dollars in wasted advertising fees because the individuals who come to your site are looking for something else entirely.
To start with use the tracking features that are available with your Adwords campaign. Check to see which of your ads are getting the profitable clicks and which ones aren't. An ad that isn't bringing any profits needs to be either scrapped or reformatted.
Take note of the keywords you used in creating these ads; these are probably not very successful ones for your product at this time (although you should not discard them completely just yet; you never know when the tides of the market are going to turn and these words are going to be your best hope).
After taking care of your keywords, check on the ads that are the least productive and decide the number of the leads that are bringing in sales. A ppc campaign that only gets idle visitors does more harm that good; that leads to a depleted budget lessened profitability.
Look at your keywords carefully and identify which ones are attracting the idle visitors and which ones are attracting paying customers. It could be as basic as the wording of the ads that is making the difference but it also could be one or more keywords that needs discarding or replacing.
To secure yourself from wasting your whole advertising budget on unsuccessful Adwords campaigns it is vital to watch your campaign on a regular basis, be sure to see to these tasks each week or at least every other week.
If you keep watch and fix any problems as they arise you can keep your Adwords Campaign working in tip top order.