For website owners wanting to track traffic on their site, search engines such as Google and Bing or Yahoo provides a variety of metric programs to be able to do it. Google Analytics, Google Webmaster Tools, and Bing Webmaster Tools all use visual data and activity reporting to give the site owners useful data and to inform them on how to develop or improve their website.
Google Analytics is a metric tool for monitoring website traffic analytics with its site owners can track, analyze traffic, and track user pattern behavior on their website. It is the essential part of understanding a site in relation to SEO, by finding out what is working and what is not. You just need to understand how to use it.
Google Analytics (and other similar analytics tools) provide detailed information such as the number of visitors, what people are doing on the site (e.g., the pages they visit, how long they stay on the site, how do they get to the site, etc.) It gives webmasters the understanding and insight they need to make effective and well thought decisions about how to improve their site; both for users and search engines. More information can be found on the Intro to Google Analytics Help Page.
Providing expiration dates is a potential way of reinforcing rankings on Google. If you renew your domain one year at a time, or renew only when the domain is about to expire, it communicates a signal to Google that the site is not a priority. This kind of information could potentially weaken rankings and is not advisable.
By registering a domain for a number of years at once, or at least a good length of time ahead from the expiration date (ie., within 12-24 months from the expiration), it indicates to search engines that, you are committed to maintaining the site activity and development for a substantial amount of time.
The Google Webmaster Tools provide site owners and marketing agencies valuable and actionable information to help improve the functionality of the websites and at the same time improve the chances of having improved organic search engine rankings.
According to Google, the purpose of the Webmaster Tool is to "help provide the data, tools, and diagnostics for a healthy, Google-friendly site."
Bing Webmaster tools provide identical functionalities as Google Webmaster Tools do.