A web page should not be imagined as a piece of paper. It is not a standard A4 that you can print simply from a text processing software like Word or Google docs. By default a web page generates for the size of a computer screen, be it a mobile phone or a computer.
A web page consists of text, images but can also include videos, slideshows, adverts, widgets, links... and may not be essential when your site users or you want to print a page of your website. If you try to print a page of your website from your web browser, the page will be printed as it is in the web browser, menus, pictures, videos, with weird page formatting (and could be a waste of paper and ink).
There are two solutions :
- Create a printable format for site visitors to print simpler (solution 1, longer)
- Print your pages from your website browser (solution 2, faster)