What Is a Technical SEO Audit and What Does It Measure?
A technical SEO audit identifies, with metrics, the obstacles a search engine runs into on your site. At the end of the review you have clear numbers in hand. How many pages did the bot crawl, how many entered the index, which page was left slow? The report answers those questions one by one with a figure. That's how you point your budget at the most critical problem. You decide on measured data rather than guesswork.
The technical side of the audit photographs your site's infrastructure, not its visible surface. In the review we take on the robots.txt file, the XML sitemap and the redirect chains. We measure the canonical tags and the server response times with the same care. We tie every finding to a number: the count of broken links, the length of the chains, the number of pages left out of the index.
This measurement-led approach forms the basis of our technical SEO service . When the audit is done you have a technical priority list in hand. The list shows which problem is blocking how much traffic. For the strategy as a whole, you can look at our SEO services page .
The Audit's Four Areas of Measurement
A full technical SEO audit measures four areas: crawlability, indexability, site speed and Core Web Vitals. Crawlability quantifies bots' access to pages, indexability their acceptance into the index. Speed measures loading time, and Core Web Vitals the real user experience. Read together, the four produce the site's technical health report.
Which Problems Does the Crawling and Indexing Audit Uncover?
The crawling and indexing audit uncovers the pages bots can't reach and the content that doesn't enter the index. Redirect chains and duplicate pages also become visible at this stage. We express the findings as numbers. How many pages met an obstacle, how many addresses redirect in a chain, how much content was left out of the index? Only with those numbers do you read the size of the problem correctly.
At the crawl stage, the search engine bot discovers your pages by following links. The audit lists the obstacles in the way of that discovery one by one. The examples are familiar: sections accidentally closed off by robots.txt, and long redirect chains. Orphan pages that receive no internal links at all, and broken links returning 404, go on the list too. On the indexing side we examine whether the page the bot crawled is accepted into the index. A technical SEO audit scores those two stages separately. Whether the problem sits in the crawl layer or the index layer separates out clearly.
Duplicate content, a faulty canonical tag and empty category pages lower the quality of the index. The number of businesses with a digital shopfront in Türkiye is rising fast. According to ETBİS's 2025 report — ETBİS is Türkiye's e-commerce information system — the number of businesses trading online reached 634,611. With competition growing at that scale, every page missing from the index is a shelf left to your competitor.
How Is Crawl Budget Measured?
Crawl budget is the amount of resource a search engine allocates to moving around your site in a given period. In the audit we compare the server log records with the crawl statistics. That's how we see whether the bot is spending its time on error pages or on important content. Wasted budget can point to serious loss of visibility even on medium-sized sites.
What Do the Gaps in Index Coverage Tell You?
The index coverage measurement compares the number of pages submitted with the number of pages that entered the index. The difference between them is one of the audit's most revealing findings. We separate that difference by cause: duplicate content, weak page quality or a server error. That separation also decides which team the fix work runs with.
How Are the Core Web Vitals Thresholds Read in an Audit?
Core Web Vitals is three metrics measuring loading, interaction and visual stability. The metrics are called LCP, INP and CLS. In the audit we classify every page group against those three thresholds. We identify the templates that exceed them. We order the fix priority by the volume of traffic affected. The result is a page-level improvement map.
The definition of each metric and the healthy threshold Google publishes are clear:
- LCP (Largest Contentful Paint): the time the largest content element on the page takes to appear on screen. Under 2.5 seconds is considered good.
- INP (Interaction to Next Paint): the time the screen takes to respond to a user interaction. We aim for under 200 milliseconds.
- CLS (Cumulative Layout Shift): the amount elements shift during loading. Under 0.1 is considered stable.
A technical SEO audit applies these thresholds to template groups rather than to individual pages. A problem in one product template affects hundreds of pages using that template at once.
Which User Experience Do the Metrics Represent?
LCP represents how quickly the page appears. INP shows how fast it responds to a tap, and CLS whether the content stays where it is. Your visitor lives those three feelings within seconds. The metrics only turn that experience into a number.
The Difference Between Field Data and Lab Data
Field data is measurement gathered from real visitors' devices. Lab data we produce in a controlled test environment. In the audit we assess the two together. Field data proves the problem exists; lab measurement helps find the root cause. Looking at only one produces an incomplete diagnosis.
How Do Site Speed Findings Affect Business Results?
Site speed findings show the root cause of slowness through measurement. The report measures the server response, the image sizes and the script load separately. A page that opens late raises the likelihood of the visitor leaving the site. The same delay also lowers the efficiency of your ad spend. That's why speed data is a commercial indicator in its own right.
The speed, or performance, audit measures three layers: the server's first response, the downloading of the resources and the browser's rendering of the page. Separating the layers turns a vague complaint into a fixable finding. The sentence “the site is slow” becomes the finding “the server is sending the first byte late”. The speed layer of a technical SEO audit shows exactly where the loss occurs.
According to the report announced by Türkiye's Ministry of Trade , e-commerce volume passed ₺3 trillion in 2024. The same announcement puts that volume's share of gross domestic product at 6.5%. TurkStat's latest research — TurkStat is Türkiye's statistical institute — also shows internet use spreading further every year. With the market growing at that scale, a site that opens late sends its customer to a competitor.
The Three Findings That Stand Out in a Speed Audit
Three findings stand out most often in audits: large uncompressed images, static files served without caching, and scripts that block the main thread. All three can be measured, and fixed without touching the content. Image compression alone can visibly shorten the loading time. The report estimates the expected gain by page group.
“We highly recommend site owners achieve good Core Web Vitals for success with Search and to ensure a great user experience generally.”
— Google Search Central, Understanding Core Web Vitals and Google search results
Ask for a Free Technical SEO Preliminary Audit for Your Site
The free preliminary audit sets out, in summary, your site's crawling, indexing and Core Web Vitals position. Before moving to a full report, you see which area holds a problem and how big it is. This first step suits SMEs that want to measure before deciding. The opening review gives you a concrete first photograph.
The process runs in three steps:
- You send us your site address; no panel access or installation is needed for the preliminary audit.
- Our team prepares a summary list of findings covering the crawl, index and Core Web Vitals measurements.
- We go through the findings together and propose a prioritised route map.
If you'd like to turn the technical SEO audit into regular maintenance, you can look at the scope of our technical SEO service . If the infrastructure needs renewing, our web design team joins the process. We keep the summary document short and write it in language that needs no technical background.
What Happens After the Preliminary Audit?
The output of the preliminary audit is a short summary showing the problem areas and the estimated size of their effect. You have concrete data in hand before setting aside resource for a technical SEO review. The decision to carry on is entirely yours. The summary stays with you with no commitment attached.
The Areas Measured in a Technical SEO Audit and the Healthy Thresholds
The audit compares five areas with Google's recommended thresholds. On a healthy site, LCP stays under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1. Time to first byte stays under 0.8 seconds. Indexed pages stay consistent with the sitemap. An area over its threshold usually points to heavy images, blocking scripts or slow hosting.
| Audit area | Metric measured | Healthy threshold (Google's recommendation) | Typical finding |
|---|---|---|---|
| Loading speed | LCP (Largest Contentful Paint) | Under 2.5 seconds | Large unoptimized images |
| Interaction | INP (Interaction to Next Paint) | Under 200 milliseconds | Scripts blocking the main thread |
| Visual stability | CLS (Cumulative Layout Shift) | Under 0.1 | Images and ad slots with no dimensions set |
| Server response | TTFB (time to first byte) | Under 0.8 seconds | Slow hosting, pages without caching |
| Indexing | Pages in the index / pages submitted | Consistent with the sitemap | Duplicate content, faulty canonical |
How Does the Audit Report Clarify the Direction of Investment?
A technical SEO audit rescues visibility problems from guesswork and turns them into numbers. Crawl obstacles, index gaps and speed findings come together in a single report. Once the report is clear, the direction of the investment is clear too. An audited site raises the efficiency of every marketing channel. You can send us your request for a free preliminary audit today.