What Are the 3 C's of SEO?

The 3 C's of SEO are most often described as content (what the page says and how well it answers the query), code (the technical setup, crawlability, and site speed), and credibility (the trust signals, links, and reputation that convince search engines the site is authoritative).

As with most letter based SEO frameworks, this is a memory aid rather than an official standard, and some sources swap in a different third C. The three ideas underneath it, quality writing, a technically sound site, and earned trust, cover the real basics regardless of the exact label.

A SEO content writer covers the content C directly, leaving code and credibility to the rest of the site setup.