Google Awords alone is not a perfect tool for keyword research. There is much more thing to do with other Google services like Google Trends and Google Insights and other Research. Use Market Samurai for better keyword research.
Google gives you Idea about your targeted keywords like related keywords, Keyword Monthly Searches. Local and Global Searches. Keyword Competition, keyword CPC and many more. Using this tool you can get all information and get idea about how much visitors you will get on your site using any keywords.
While the Adwords tool is meant for PPC, it’s also a vital tool when performing keyword research for SEO. Google Adwords identifies the number of searches for specific words or key phrases. However, many people leave with false information because there are several different filters with different numbers.
AdWords keyword tool for SEO is to research keywords according to search engine criteria. After selecting keywords Adwordstool ensures that the Keywords you have picked converts well. With keyword research, AdWords is a valuable tool for getting a better CTR (Click Thru Rate) with your existing rankings. Another good use of AdWords for SEO is geotargeting
Google adword keyword tool is best tool for the keyword research you can find best keywords for your site using this tool.you can check your desired keywords and it also give some keyword suggestions for your site.
Good adword keyword tool is best for keyword analysis because it gives us detail about the searches and competitions of keyword on the web. And therefor it make easy for us to select proper keyword that may be targeted for seo.