What are cookies?

The simple guide to computer 'cookies'

First things first

In contrast to popular belief, cookies are not programs they are files that are downloaded onto your computer, your computer will automatically check for any relevant cookie files when it goes onto a website, and if it finds one, it will send the information back to the website

Positives

They store useful data to make browsing easier in the future, such as privacy settings, and how long you spend on a site, and what things you use the most on the site.