Cookies are small text files that are stored on the device of the Internet user to visit a web page. Is the operator of the web site that determines what kind of information contains the cookie and what is its purpose, and can also be used by the web server whenever you visit this website. Cookies are used to save time and make more efficient web browsing experience. However, they can be used for several different purposes ranging from remember login information or containing your purchase order.
There are a lot of guides which explain what are cookies, and what are they used for. Pro us, I will explain how these cookies affect web page of webexpertia, but in case you need more information on this, take a look at these pages: