hi is there anyway to setup google anyatlic so it tells you which keyword people use to find your web site?
You will want to use the 'matched search query' report to find the exact words your visitors are using. If you use the 'Adwords Keywords' report, you'll only see the keywords you are using in Adwords. Not the exact keywords the visitor has used in his search query.
Just type your niche relevant words in google adwords, You will find hundereds of options on for your website, check CPC and competition of the keywords which you want to choose and try to put in google with (""), You will find the exact competition of your keyword. I hope it can help you!
First you need to link Google Analytics to your Google AdWords account and by visiting this link: https://support.google.com/adwords/answer/1704341?hl=en, you can learn how to link Google Analytics with Google AdWords. After linking Google AdWords and Analytics, you can get the keywords data by visiting Acquisition tab -> then select AdWords tab -> then go to Matched Search Queries Report. By visiting this you can get the keywords people use to find your website.
Best solution is to add that site to Google Webmaster tool and there you can see all keywords information that you need.