Whilst standard analytics tools will give you information about which keywords are sending traffic to your website, they will not tell exactly where you are ranking for those keywords on search engines like Google. To benchmark search engine performance and analyze keyword ranking changes over time you typically need to use a search engine ranking and tracing tool.
The choice of tool depends on the level of search engine ranking analysis you wish to perform. Although some basic tools will give you information on keyword rankings the more advanced tools will give you further insights into performance over time, country specific Google rankings, competitor ranking analysis and much more.
What free tools are available to allow me to quicky check my website rankings?
Rank Checker (Free Firefox plugin)
How do I get more advanced ranking information and insights, a view of my search engine performance over time, competitor ranking insights etc?