Cookies are pretty cool. They make your online experience personalised by helping us show you relevant JustMeat adverts when you browse other websites, helping us to understand how you are using our own website, and saving you lots of time by remembering your details. But how do they do it? Cookies are actually small files that are stored on your computer or phone. They store small bits of data so that when you visit a website, it can remember your preferences and make sure it shows you content that is relevant to you. All cookies have expiry dates that determine how long they stay in your browser: