What are these cookies called, and what do they do?
_utma tracks the number of times a visitor has been to the site, when their first visit was, and when their last visit occurred. It expires after 2 years.
_utmb and _utmc track how long a particular visit takes. _utmb expires after 30 minutes, _utmc expires once you close your browser.
_utmz tracks which site or search engine the visitor came from, the link clicked or keyword used, and the visitor’s geographic location. It expires after 6 months.
These four cookies are placed by Google Analytics and help us understand how visitors interact with our website. Google Analytics does not collect personally identifiable information, and we do not share our collected data with Google. Read more about Google Analytics or download the Google Analytics Opt-out Browser Add-on.
We also use session variables on our customer sites to store the contents of shopping baskets, but these expire after 20 minutes.