What are cookies?
A cookie is a technology for remembering information between webpages.
In reality, a cookie is a small text file which is stored by the user’s browser. The cookie only contains data, not code, so it can’t contain a virus or spyware. This doesn’t mean that all cookies are harmless in intent, but they can only ever store information.
A cookie remembers information about a specific website, for example.
This information is restricted to a specific domain, e.g. silktide.com.
The domain prevents other websites from accessing each other’s cookies. However there are ways that websites can share information as we’ll see.