HitTail is a website which offers service for providing the search engine keywords leading to your website. I have been using this website as a beta user for quite some time and it has proved to be very good website for me to know more about the users landing over my blog and website.
There are different sections over website which provide detailed overview of the keywords and search hits. HitTail also tells you the vital stats like number of hits distributed across different search engines, search keywords and also suggests the keywords.
Presently, HitTail is available in two versions – public beta and premium offering. The premium version includes all the basic features listed above plus HitTail Plus conveniently brings suggestions right to your mailbox and/or RSS reader by secure, password-protected RSS feeds. It also gives you a representative sitemap of your site and inform you whether the code is installed on all of your pages. Sitemaps are ready to be exported to Google and Yahoo, which can help your site to be indexed properly. HitTail Plus users also have the added support for tracking on secure https pages.
A service worth trying for webmasters specially those who are more concerned about SEO.