Cookies are text files that are stored on a user's computer when they visit a website that uses them. Thereafter, the cookie sends information back to the website. They can be used to monitor browsing preferences of users, eg types of goods searched for, pages visited and length of dwell time on each page. However, you need to be open with your customers about how you will use this information to comply with the law on cookies.
This information should be easy to understand and should tell users of the website that cookies will be used to collect and store information about them. You should also give users the opportunity to refuse the continued storage of any cookies on their computer or access to it and explain how users can turn the cookies off. There are very few circumstances where this information does not have to be provided.