Does the length of your website's domain name registration affect the search results at Google? This question has come up recently and a lot of website owners have been wondering about it, especially since it was mentioned in a patent awarded to Google in April. According to the patent, "Certain signals may be used to distinguish between illegitimate and legitimate domains. For example, domains can be renewed up to a period of 10 years. Valuable (legitimate) domains are often paid for several years in advance, while doorway (illegitimate) domains rarely are used for more than a year. Therefore, the date when a domain expires in the future can be used as a factor in predicting the legitimacy of a domain and, thus, the documents associated therewith.

Expired domain name buyers are prevalent nowadays. If your domain name expires, there's a good chance that someone watching will register your domain name within seconds after it expires. If, for whatever reason, you don't renew your domain name, someone watching a 'watch list' of expiring domain names will try to capitalize on the online business that you've built over the years. They know that there is potential website traffic they can have simply by renewing your old domain name. By renewing your domain name for several years, your domain name won't expire for a while, and it won't be opened up to expired domain name buyers.