What is the difference between web site and internet page?
Strictly speaking, a web page (also called internet page) is an individual page that can appear in a browser window, whereas a web site (also called internet site) is a collection of such individual pages that somehow belong together.
The most important page on a web site is its home page. It's the page that most people go to first each time they visit the site. From there they click links to other pages on the same site (or of course on other sites), which then open in their browsers instead of the home page.
The word home page is also used for the web site of an individual person. Often these are tiny web sites consisting only of a single page. But confusingly, it is also correct to refer to a large web site of an individual as that individual's home page. This home page then consists of a home page in the other sense and many other pages.
That said, most people don't distinguish the three terms. For them, web page, web site and home page are all the same thing. The best approach is to use these terms correctly yourself but to make no assumptions about what another person really means when they use one of the three terms.