How the internet works.
At first, we have to know what is a web page.
A web page is a document that contains links that follows another documents. It's a base characteristic of web pages. Also, it has special words for markup like an h for titles or a table, a thead, a tbody, etc for tables. This type of documents could be considered as simple text docs which could be interpreted by the browser in a nice view. Actually, you could write this one by yourself in any text editor and then open it in your favorite browser locally.