Reference Library

Technical SEO Resources

Every check the platform runs, organized by category. Each page explains what the check detects, why it matters, and how to fix it.

7 subcategories

On-Page Content

Titles, meta descriptions, headings, Open Graph tags, content quality signals, and structural issues that affect how search engines understand each page.

Browse checks →
9 subcategories

Indexability

Robots directives, redirects, canonical tags, sitemaps, hreflang, and everything that controls how search engines discover and index your pages.

Browse checks →
4 subcategories

Internal Links

Broken links, orphan pages, anchor text quality, nofollow misuse, and link-equity problems across your internal link graph.

Browse checks →
3 subcategories

External Links

Broken outbound links, blocked resources, and unsafe cross-origin links that affect trust signals and user experience.

Browse checks →
5 subcategories

Images

Broken images, missing or over-long alt text, oversized files, missing dimension attributes, and next-gen format opportunities.

Browse checks →
3 subcategories

Structured Data

Schema markup coverage, JSON-LD validation errors, unsupported schema types, and rich-result eligibility issues.

Browse checks →
3 subcategories

Performance

Core Web Vitals (LCP, CLS, INP), overall PageSpeed scores, and excessive CSS/JS resource counts that slow page load.

Browse checks →
3 subcategories

URL Structure

Spaces, uppercase letters, non-ASCII characters, excessive query parameters, tracking variables, and other URL formatting issues.

Browse checks →
4 subcategories

Security & Headers

HTTPS enforcement, mixed content, HSTS, Content Security Policy, X-Frame-Options, and HTML document integrity checks.

Browse checks →
3 subcategories

Search Console

GSC indexing gaps, mobile usability, AMP and rich result errors, and search analytics inconsistencies surfaced alongside the technical crawl.

Browse checks →
1 subcategory

GA4

Google Analytics 4 discovery checks — pages receiving real user sessions that the crawl never reached, almost always orphaned from the internal link graph.

Browse checks →

How checks are organized

Every check the platform runs has a dedicated page in this library. Pages are organized across four levels — from broad category down to the individual check condition. The URL structure reflects this hierarchy:

Category Subcategory Individual Check

Example: On-Page Content › Meta Descriptions › Missing Meta Description

Use the sidebar to navigate by category and subcategory. Each subcategory page lists every check in that group. Clicking a check opens its dedicated page with the full explanation and fix guidance.

Severity levels

Every check is assigned one of three severity levels. These match exactly what you see in the dashboard — same colors, same labels, same meaning.

Error
Requires immediate attention

The condition is actively blocking indexation, breaking functionality, or causing significant ranking harm. Fix these before anything else.

Warning
Worth fixing soon

The condition is a real problem that may be suppressing performance. It does not typically block indexation on its own, but it warrants attention in your next optimization pass.

Notice
Lower priority, but worth tracking

The condition is an imperfection rather than a critical fault. Individual instances are low risk, but a high count across a site can add up to a measurable impact.

What each check page covers

Every individual check page follows the same structure so you always know where to find what you need:

01

What this means — Plain-English description of the condition the check detects and what it tells you about the page.

02

Why it matters for SEO — The specific ranking, indexation, or user-experience impact this condition can have, and why it is worth resolving.

03

What the platform checks — The exact trigger condition: what the crawler looks for, what constitutes a pass or a fail, and how edge cases are handled.

04

How to fix it — Step-by-step remediation guidance, with code examples where relevant, covering both CMS-based and custom-built sites.