Why Most Technical SEO Checklists Are Useless
I’ve been running technical SEO audits since 2018. In that time, I’ve audited over 300 websites — from solo-founder Shopify stores doing £8K/month to enterprise platforms handling 50 million monthly sessions.
Most checklists are wrong. Not factually wrong — but completely useless in practice because they don’t tell you what actually matters. They list 200 checks without telling you that 180 of them are irrelevant and 3 of them are responsible for 80% of the opportunity.
Section 1: Crawlability & Indexation
If Google can’t crawl your pages, nothing else matters. This is always the first section I audit — and it’s where I find the most significant issues on mid-to-large sites.
1.1 Robots.txt
Your robots.txt file tells search engine crawlers which pages they can and cannot access. A misconfigured robots.txt can block your entire site from Google — and it happens more often than you’d expect, usually after a site migration or CMS update.
- robots.txt is accessible and returns 200
- No critical pages or directories are Disallowed
- Sitemap is referenced in robots.txt
- Correct user-agent targeting for specific bots
1.2 XML Sitemap
Your XML sitemap is your direct communication to Google about which pages you consider important and want indexed. A poorly structured sitemap is one of the most common issues I find.
- Sitemap contains only canonicalised, indexable URLs
- Sitemap is submitted to Google Search Console
- Sitemap uses correct lastmod dates
- No redirect chains in the sitemap
Section 2: Core Web Vitals
Google’s Core Web Vitals have been a confirmed ranking factor since 2021. But the way most auditors approach them is wrong — they fix symptoms rather than causes.
LCP (Largest Contentful Paint) measures how long it takes for the main content of a page to load. Target: under 2.5 seconds. The most common culprits are unoptimised hero images, render-blocking JavaScript, and slow server response times.
INP (Interaction to Next Paint) replaced FID in March 2024. It measures responsiveness to all user interactions throughout the page lifecycle. Target: under 200ms.
CLS (Cumulative Layout Shift) measures visual stability. Target: under 0.1. Most commonly caused by images without explicit dimensions, ads loading late, or web fonts causing layout shifts.
Section 3: On-Page Fundamentals
On-page fundamentals are the table stakes of technical SEO. They won’t win you rankings on their own, but getting them wrong will actively suppress your performance.
- Every page has a unique, keyword-targeted title tag under 60 characters
- Meta descriptions are compelling and under 155 characters
- H1 tags are present, unique, and contain the primary keyword
- Canonical tags are implemented correctly across all pages
- Hreflang is correctly implemented for multi-language sites
The Priority Order That Actually Matters
After 300+ audits, here is the order I always work in: crawlability first, indexation second, Core Web Vitals third, on-page fourth, structured data fifth. Everything else — image alt text, internal linking polish, schema breadcrumbs — comes after the fundamentals are locked.
The most expensive mistake I see is teams spending 40 hours on image compression while a crawl budget crisis silently prevents half their site from being indexed. Fix the foundations first. Always.