Author/Source: Cookies are small files websites save on your computer to remember information about you. Website data is a broader term for all the information a site stores. See the full link here
Takeaway
This article discusses a new feature in the Firefox web browser that lets you quickly delete cookies and website data for a specific site. This makes it easier to protect your privacy while browsing the internet.
Technical Subject Understandability
Beginner
Analogy/Comparison
Clearing website data is like cleaning up crumbs after visiting a website so it doesn’t remember you were there.
Why It Matters
Clearing website data can help protect your privacy by removing information websites store about you. For example, if you shop for a gift on a website, deleting the data can prevent the website from showing you ads for that product later.
Related Terms
Cookies, website data
Tech Teacher 
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