PPC advertisement is cheap and easiest way to promote your product or services. Targeted traffic is your primary goal. You want to attract potential visitors to visit your web page. If they are looking for something else, you don’t want them to click on your ads or you need to pay if they click. How to avoid these non-targeted traffic? That’s negative keywords.
Google adwords allows you to add negative keywords. Your ads will not show in seach query that containing negative keywords. You can stay away from those non-targeted traffic. You may worry that negative keywords may result in fewer impression. Yes, it may reduce your ad exposure but it gives you quality traffic, which is more important. In Adwords blog, there is a article “Everything you ever wanted to know about negative keywords” talks about negative keywords.
Follows are the list of negative keywords you may find useful. You’d better review them one by one to ensure it fits your business or not.