Simplify the following text for a Grade 3 native English-speaking person.
Original: Without cookies , each retrieval of a Web page or component of a Web page is an isolated event , mostly unrelated to all other views of the pages of the same site . Other than being set by a web server , cookies can also be set by a script in a language such as JavaScript , if supported and enabled by the Web browser .
Simplified: They are sometimes called web cookies or just cookies .