Google Adword is advertising solution for advertisers. By using Adword, advertisers can advertise their product, service, or business on various websites where Google ads are displayed. When creating Adword campaign you will have to target your ad according to keywords, location etc. The basis of keyword targeting is your ad will appear only on those websites that use your chosen niche. When you target according to location, your ad will be visible only to the people in that location. When your ads appear on the website using your target keyword and target location, your sales will improve. There are also other metrics to follow, but keywords and location are very important.