SEO Audit in 2026: What It Is and What It Should Include

Currently, SEO audits focus on aspects that were previously secondary, and clearly on the absolute consolidation of Artificial Intelligence in search engines.

In this post we are going to talk about SEO audits, from an introductory perspective: we are going to give it a definition, and we are going to break down all the aspects that it should include, as well as its prioritization at this time, because in this 2026 we must pay special attention to optimization for generative engines (GEO), Google's AI Overviews and the demonstration of real human experience in the face of the avalanche of automated content. This post should help you make a check-list in case you want to do an SEO audit, or identify the key elements if you are thinking of hiring an SEO agency or professionals. Let's go:

What is an SEO audit?

An SEO audit is used to know the current status of a project from an SEO perspective. We could define it something like "a set of analysis tasks to evaluate the level of organic positioning that a website has". A web page is understood here as the entire set of URLs that make up a website, not just the main page.

An SEO audit has two main lines, which correspond to the two universes of organic positioning: on-page SEO (on our website) and off-page SEO (outside our website).

Key aspects that an SEO audit should include:

1) Indexing and traceability

At the level of crawlability, we must analyze which pages Google browses, what content it discovers in them, and if problems are found in that crawl (broken links, duplicate content, etc.). Much of this information can be found in Google Search Console. Indexing refers to which pages Google has crawled it has chosen to include in its index. Broadly speaking, it's about knowing the relationship between the URLs that my website should index (the ones I send in my sitemap) and the ones that Google has finally indexed. In 2026, you can check the exact status using the advanced page indexing report in Search Console.

2) Redirect Control

At this point, the volume and type of redirects applied are analyzed. All protocols should be redirected to a single version (https://www), and if there are multiple domains, the secondary ones should redirect to the primary one. 301 redirects are permanent and transmit authority, while 302 redirects are temporary and don't usually do so. It's vital in 2026 to avoid long redirect chains, as search engines are becoming stricter about the energy and tracking efficiency of their spiders.

3) Technical review

• Use of canonicals: Indicate the original version to Google when there are multiple similar URLs.
• Mobile-First Indexing: key to user experience and crawling. You can use the Mobile Friendly test.
• Core Web Vitals: Speed and visual stability are critical. By 2026, the INP (Interaction to Next Paint) metric is already fully consolidated as the site's key response factor to obsolete FID.
• W3C protocol: A well-structured code improves the understanding of the site by search engines.
• Loading speed: Affects user experience and positioning. Use PageSpeed Insights.
• Friendly URLs: they should be short, understandable, with keywords, hyphens and no special characters.
• Semantic markup (Schema): Applying Schema.org tags is no longer optional, it's the standard. It's the primary way to structure information so that Google's artificial intelligences and rich results understand the exact context of the data.

4) Linking Analysis

Incoming, outgoing, and internal links should be reviewed. It prioritizes identifying broken links, analyzing their quantity, attributes (follow/no-follow), relationship between inputs and outputs, authority of the originating domain and thematic relationship. Ahrefs, Search Console, or Search Console are a must-have and useful here.

5) Other aspects to take into account

• Images: Avoid broken images, use  highly descriptive alt attributes (AI models use them to understand visual context), and next-generation formats (WebP, AVIF).
• Meta tags: Review duplicate, empty, or inappropriately lengthed titles and descriptions. Although Google's AI often rewrites them in the SERPs, they are still the foundational basis for understanding the purpose of the page.
• Server analytics: It should be fast, secure (SSL), geolocated, and tailored to your CMS.
• Sitemap and robots.txt scanning: Make sure these files exist, are properly configured, and block unnecessary routes.
• Use of hreflangs: essential for multilingual and international projects.

6) Content Quality and ESAW (Vs. AI)

With the web flooded with synthetically generated content, Google demands more than ever the demonstration of human expertise. The ESAW concept (Experience, Expertise, Authority, Reliability) guides this approach. The audit must verify whether the texts:

• They demonstrate first-hand experience (the first "E").
• They are drafted or endorsed by entities with a demonstrable reputation in the industry.
• They include clear sources and evidence.
• They inspire trust with visible authors, contact details, and clear policies.
• They respond to search intent by providing unique value that a massive language model could not generate on its own.

7) User Experience and SXO

 SXO (Search Experience Optimization) combines SEO and UX. The aim is to ensure that the user not only reaches the website, but also easily finds what they are looking for and does while avoiding a quick return to search results (pogo-sticking). The audit should analyze:

• Clear content hierarchy and scannable design.

• Deep engagement and active dwell time metrics.
• Clarity and accessibility of calls to action (CTAs).

8) GEO (Generative Engine Optimization) and AIO (AI Overviews)

SEO in 2026 necessarily involves generative Artificial Intelligence. We no longer only optimize for classic blue links, but also to be the source cited by conversational search engines (such as Google's AI Overviews, ChatGPT, Gemini or Claude):Clear, structured and contextualized content.

• Content structuring by answering direct questions (Direct Answers format).
• Implementation of the llms.txt file in the root directory to cleanly guide AI agents crawling the web.
• Building a strong brand presence: AI models prioritize referencing recognized entities present in trusted media.

9) Off-page SEO Audit

A complete SEO audit cannot focus only on what happens inside our website. Off-page SEO analyzes all the external factors that influence our rankings, especially backlinks, and brand mentions that feed the great language models (LLMs).

• Domain age: Older domains with a clean history are generally considered more trustworthy by Google.
• Domain Authority (DA/DR): Analyzes the overall strength of your domain based on the quality and quantity of inbound links.
• Backlink Profile:
• Quality of the domains they link to.
• Thematic relationship between your site and the site of origin of the link.
• Geographic distribution (IP geolocation).
• Type of anchor text. In 2026, exact match abuse  is immediately detected and filtered by anti-spam algorithms. Naturalness is prioritized.
• Diversity of sources and balance between follow and no-follow links.
• Unlinked mentions (Co-occurrences): can also be useful to reinforce brand authority and awareness.

Tools such as Ahrefs, Majestic, Moz, Semrush or SE Ranking can help you collect and analyze this data in an advanced way. The objective will be to detect opportunities for improvement, toxic links that should be disallowed, or  future Digital PR (Digital Public Relations) strategies.

Now what?

So much for our updated post on the key aspects that an SEO audit should include in 2026. You can complement it with articles such as SEO trends in 2026, or our post on tools for SEO audits. If you need professional help, we'll be happy to perform a custom audit for your site.