An SEO audit is a health check for your website. It shows why you are not ranking as well as you should and, more importantly, what to fix first. This checklist walks through every area that matters, from technical foundations to content and links, in the order a professional would work through them. Use it to audit your own site, or as a benchmark when you hire an agency.
Quick answer: A full SEO audit covers six areas: crawling and indexing, technical health, on-page SEO, content, off-page authority, and analytics. Work top to bottom, fix the issues that block rankings first (indexing and technical), then improve content and links.
Before you start: tools you will need
You do not need everything, but a basic stack makes the audit far easier:
- Google Search Console for indexing, queries and Core Web Vitals
- Google Analytics for traffic and conversions
- A crawler such as Screaming Frog or Sitebulb
- An SEO platform such as Ahrefs or Semrush for keywords and backlinks
- PageSpeed Insights for performance
1. Crawling and indexing
If Google cannot crawl or index a page, nothing else matters. Check these first.
|
Check |
What to look for |
|
Indexed pages |
Compare indexed pages in Search Console to your real page count |
|
robots.txt |
Confirm it is not blocking important pages or resources |
|
XML sitemap |
Present, current, submitted, and free of errors |
|
Noindex tags |
No accidental noindex on pages you want ranked |
|
Crawl errors |
Fix 404s, server errors and redirect chains |
|
Canonical tags |
Point to the correct primary version of each page |
2. Technical SEO
With indexing sorted, check the technical foundations.
- Site speed and Core Web Vitals: pass LCP, INP and CLS on mobile and desktop.
- Mobile-friendliness: the site works cleanly on phones, where most traffic sits.
- HTTPS: the whole site is secure, with no mixed-content warnings.
- Site structure: a logical hierarchy where key pages are a few clicks from the homepage.
- Broken links and redirects: fix broken internal links and reduce redirect chains.
- Duplicate content: resolve duplicate or thin pages with canonicals or consolidation.
- Structured data: add relevant schema (Organisation, Breadcrumb, FAQ, Product) and validate it.
3. On-page SEO
Now check how well individual pages are optimised.
|
Element |
Best practice |
|
Title tags |
Unique, descriptive, include the target keyword |
|
Meta descriptions |
Compelling, unique, encourage clicks |
|
Headings |
One clear H1, logical H2/H3 structure |
|
URLs |
Short, readable, keyword-relevant |
|
Keyword targeting |
One primary intent per page, no cannibalisation |
|
Internal links |
Relevant links pass authority to key pages |
|
Image SEO |
Descriptive alt text and compressed files |
4. Content quality
Rankings follow content that genuinely serves the searcher.
- Search intent: each page matches what the query is really asking for.
- Depth and usefulness: content answers the question better than competitors.
- Freshness: important pages are updated, not left to go stale.
- E-E-A-T: experience, expertise, authority and trust are visible, especially for money or health topics.
- Thin and duplicate content: improve, merge or remove weak pages.
- Content gaps: find valuable topics and keywords you do not yet cover.
5. Off-page SEO and authority
Authority still drives competitive rankings.
- Backlink profile: review referring domains and overall link quality.
- Toxic links: identify spammy links and disavow only if clearly harmful.
- Competitor gap: find quality domains linking to rivals but not you.
- Brand signals: consistent mentions, reviews and citations across the web.
- Local citations: consistent NAP details if you serve a local area. See our local SEO guidance.
6. Analytics and tracking
An audit is only useful if you can measure the results of your fixes.
- Tracking is correct: Analytics and Search Console are set up and not double-counting.
- Conversions are tracked: goals or events capture real business outcomes.
- Traffic trends: identify pages losing traffic and investigate why.
- Top pages: know which pages drive traffic and protect them.
How to prioritise your fixes
Not every issue is equal. Work in this order:
- Blockers first: indexing and crawl problems that hide pages from Google.
- High-impact technical: speed, mobile and duplicate content.
- On-page wins: titles, intent matches and internal links on important pages.
- Content: upgrade or create pages that target valuable queries.
- Authority: earn links and strengthen brand signals over time.
Frequently asked questions
How often should I do an SEO audit?
A full audit once or twice a year, with lighter monthly checks on rankings, indexing and Core Web Vitals.
How long does an SEO audit take?
A focused audit takes a few days; a deep audit of a large site can take one to two weeks.
Can I do an SEO audit myself?
Yes, this checklist covers the essentials. An agency adds depth, tooling and a prioritised action plan, which helps for competitive or large sites.
What is the most important part of an SEO audit?
Crawling and indexing. If Google cannot access and index your pages, no amount of content or links will help.
Turn your audit into results
An audit is only valuable if the fixes get done. If you want a professional audit and a clear plan to act on it, talk to MediaPlus Digital. Explore our SEO services in Singapore, and if you run an online store, see our dedicated ecommerce SEO audit checklist.
