Negative keywords prevent ads from showing for search terms containing such keywords. For example, if you sell new cars you can use keyword "cars" but you may want to use negative keyword "used" to prevent your ad from showing when someone is searching for "used cars". Negative keywords are used to reduce low quality traffic.
Thanks, i have added negative keywords for one of my compaign, but i have got 0 clicks for 404 impressions.
Negative keywords do not affect number of clicks you get, at least not directly. They affect number of impressions. So to get more clicks try writing more compelling ads and make sure that your ads appear in a decent position.
Negative keywords are very important. I use the below automatically whenever I set up a PPC campaign. These words should be in almost any account, regardless of product or service: free craigslist directions ebay facebook free sample game games lyrics map maps myspace nude porn recipe samples sex sexy utube you tube Negative words have nothing to do with CTR%...try writing more compelling ads. Do a search, see what your competitors do, and copy that....
Negative keywords are words that you don't want to be associated with your campaign. It's pretty simple and actually useful. Yelana hit it right on the spot.