When you are using multiple variables into one single representation
An array is a collection of variables that can be called as a single variable. It helps reusability in your code.
For example, you can have an array of all your classmates name rather than declaring them one by one. You can use this array when selecting/filtering a specific name that you might need in the future.
meaning - it is a collection of related network web resources, such as web pages, multimedia content, which are typically identified with a common domain name, and published on at least one web serve
function :websites can be the work of an individual, a business or other organization, and are typically dedicated to a particular topic or purpose.
because you have copied, stole, or borrowed someone's original idea, claiming it to be your own work, which is a serious offense.