It doesn’t take an SEO expert to know what 404 means in Internet use. It’s so common that the error code spawned different uses for it in memes.
However, 404 isn’t the only error code. Programmers are well-versed on various status codes, even ones that imply a successful connection to the page. This is important for SEO as visitors, crawlers, and links will behave differently for each status code. Below are some of the various status codes in use today. Read the rest of this entry