Behind any site and its function lies source code that turns the browser into a convenient and intuitive user interface.
Any code used to be seen as a dark and scary wormhole that can only be understood by an experienced professional with considerable technical experience.
HTML is not that complex and scary, site owners and SEO specialists can benefit greatly from reading it, since there are not that many elements that are needed and you can learn to find them quickly.
Full article here: https://www.seoquake.com/blog/how-to-view-source-code/
Are there any other methods?