Lot of uses are there. Among them Keyword Research is most popular. You can log on Google adword tool & see the options. This is simple.
using keyword tool you can see what related word searches your ad will show on.this can help you analyze your return on investment.
Google adwords help you to get targeted traffic for the keyword you are focusing on, it helps to gain instant traffic..
Following are the some of the advantages of Google Adwords Tools: Generate the absolute best keyword list for your target market. Use simple techniques to vastly expand your productive keyword list. Create highly clickable copy for your ad. Precisely limit the distribution of your ad to only those prospects who are most interested. Beat the competition with creative bidding strategies. Dramatically reduce costs of your campaigns while increasing clickthroughs.