On-Page SEO & Off-Page SEO: What Every CMO Needs to Know Before Their Next Audit

As SEO specialists, we spend a lot of time auditing websites for new clients. And we’ll tell you what we see again and again: the reason a site isn’t ranking in organic search almost always starts with broken or missing SEO signals.

On-page SEO refers to the text and HTML on your site, or everything the user sees, and everything the search engine reads. When these elements are misaligned, incomplete, or neglected, no amount of off-page work will close the gap.

The most fundamental on-page elements are your heading tags: your H1, your H2s, and your H3s. The H1 communicates the primary focus of a page to Google. The H2s and H3s provide secondary context, helping search engines understand the structure and depth of your content. When we audit a site and find H1 tags that are missing, duplicated across pages, or stuffed with irrelevant text, we know exactly why rankings are suffering. This isn’t a cosmetic fix as a heading structure is a core signal and part of the data architecture.

Body text matters just as much. When we signal to Google via an H1 that a page is about a specific topic and then fail to mention that topic in the body copy, we create a logical disconnect that search engines penalize. Your target keywords are informed by real keyword research, not guesswork, and need to live naturally within the page text. 

Every page should pass a simple logic test: does the content on the page actually support the claim the heading makes?

Off-page SEO covers a number of elements that work behind the scenes, yet have an enormous effect on your site’s visibility and crawlability. These break down into three broad categories: technical directives (how you communicate with Google), structural integrity (how your site is organized and indexed), and authority signals (how the web endorses your domain).

Page titles and meta descriptions fall squarely in this category. A page title, the tag that appears in search results, must be properly formatted, keyword-targeted, and unique across every page on your site. Meta descriptions, while not a direct ranking factor, communicate the purpose of a page to both Google and searchers. When they’re duplicated, truncated, or missing entirely, you’re leaving organic click-through rate on the table. These are straightforward fixes that pay dividends quickly.

Redirects and canonicals are where things get more technical. Redirects handle broken or outdated URLs, ensuring users and crawlers don’t hit dead ends. Canonicals tell search engines which version of a page is the “master” copy which is critical for avoiding duplicate content penalties. XML sitemaps and robots.txt complete the picture: sitemaps tell Google where to find your pages, while robots.txt controls which areas of the site crawlers are allowed to access. Noindex settings add another layer, letting you suppress pages you don’t want showing up in search results at all. Misconfiguring any of these can effectively hide your best content from Google.

Backlinks are links from external websites pointing to yours, remain one of the most powerful signals in off-page SEO. Google treats them as votes of credibility. The more authoritative the linking domain, the more weight that vote carries.

The data is revealing:

Top-ranking pages have 3.8× more backlinks than those ranked positions 2 through 10, according to Backlinko’s 2025 analysis. Yet 95% of all web pages have zero backlinks, meaning quality link building is a genuine competitive moat. Building backlinks from trusted, relevant websites is not a one-time project; it’s an ongoing program that includes outreach, content strategy, and relationship development. When we approach link building for a client, we start by auditing their existing backlink profile, identifying toxic links that need to be disavowed, and building a realistic roadmap for earning authoritative placements.

Website speed, or pagespeed, is confirmed by Google as a direct ranking factor, first for desktop in 2010 and for mobile in 2018. Since 2021, it’s been formalized through Core Web Vitals as part of Google’s Page Experience signal. The user experience data behind this is unambiguous: 53% of mobile visitors abandon a site that takes longer than 3 seconds to load. That’s more than half your potential audience gone before they’ve read a single word.

When we review pagespeed for a client, we look beyond the raw score in Google’s PageSpeed Insights tool. The metrics that matter are Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS),  the three Core Web Vitals metrics. 

Fixing TTFB (Time to First Byte) through server-side improvements, compressing images, and eliminating render-blocking JavaScript are consistently the highest-leverage changes we can recommend. In competitive search landscapes, speed is often the tiebreaker between two otherwise equal pages.

Some of the most consequential off-page issues we encounter in audits are the smallest-seeming ones. URL structure affects both crawlability and keyword targeting whereby short, descriptive URLs outperform long parameter-laden ones. 

Noindex tags, when accidentally applied to important pages, completely exclude them from search results. A misconfigured robots.txt file can accidentally block Google from crawling your entire site. These aren’t edge cases, we see them with startling regularity, even on sites that have had “SEO work” done before.

On-Page SEO Elements

• H1 (primary heading)
• H2s (section headings)
• H3s (supporting headings)
• Body text & keyword usage
• Responsive / mobile-ready design
• XML sitemap (also off-page)

Off-Page SEO Elements

• Page title & meta description
• Redirects & canonicals
• Website speed / pagespeed
• Backlinks from trusted sites
• URL structure
• Noindex settings & robots.txt

The interplay between these elements is what makes SEO genuinely complex. A technically perfect robots.txt doesn’t compensate for missing H1 tags. Great backlinks don’t rescue a site with a 9-second load time. On-page and off-page SEO must work in tandem, and knowing which issues to prioritize requires both experience and data.

As a CMO, you already know that organic search is a high-value channel. Organic search drives 53% of all website traffic, and SEO delivers an average ROI of 12.2× marketing spend. But the gap between knowing SEO matters and knowing what to fix, and in what order, is exactly where a specialist earns their value.

An SEO audit surfaces every on-page and off-page issue across your entire site: missing or duplicated page titles, weak H1s, broken redirects, canonicalization problems, crawl blocks, backlink gaps, pagespeed failures, and more. But the audit is only half the work. The other half is prioritization. Not every issue carries equal weight. A blocking robots.txt directive is an emergency; a slightly suboptimal H3 is a polish item. We’ve seen clients waste months fixing low-impact issues while missing critical problems. A seasoned specialist knows the difference, brings the right toolset, and builds a sequenced action plan that moves the needle on rankings from day one.

If your organic traffic has plateaued, rankings have slipped after an algorithm update, or you’ve never had a structured SEO program, a comprehensive audit is the right next step. The investment is small relative to the cost of flying blind, and the upside of ranking where your competitors don’t is measurable and lasting.