Welcome to Sainsbury’s Help Centre
‘Cookies’ are used to provide aggregated statistics on visitors to our websites and their browsing behaviour. This enables us to order the site to make customers’ journeys easier, and if necessary make improvements. The data is aggregated and anonymised, which means we cannot identify you as an individual.
We use a number of tools to carry out analytical functions on our site including, Google Analytics and Omniture.
And here http://www.omniture.com/en/privacy