Definition of cookies
A cookie is a small text file that the website asks to store on your computer and that contains a certain amount of information and a particular timestamp.
The browser saves the information in a special place in your computer and returns the information in the cookie to the web site you visited, any application of the pages / images from the site.
How to handle cookies
If you do not accept cookies, you can disable cookies via your browser's security settings. You can also set your browser to alert you every time a website tries to set a cookie on your computer. The browser can also delete previously stored cookies.
See your browser's help pages for more information on how you can view the cookies stored in your browser, how to remove them and make settings for cookies should be accepted or not.