What is SEO? Free Tools & Developer Tutorials | SEO Lucas
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    SEO LucasDiagnostic ledger

    SEO LUCAS / DIAGNOSTIC LEDGER

    Fix the right SEO problem before chasing the score.

    Enter one URL to get impact-ranked findings, verifiable technical evidence, and a next step your team can act on.

    001 / URL SCANLIVE

    Nine modules run together; locked, quota-limited and non-applicable checks stay visible.

    Start without signing in; no changes to your siteRetest after every fix
    01Crawl & index
    02Page signals
    03Technical delivery
    04Structured data
    05International

    FROM EVIDENCE TO ACTION

    More than a list of issues — a clear order of work

    Every audit follows the same reproducible path, so developers, writers, and operators can decide together.

    1. 01

      Inspect public signals

      Read the page, response headers, and technical settings visible to search engines.

    2. 02

      Rank by impact

      Turn scattered checks into priorities, starting with blockers to crawling and understanding.

    3. 03

      Fix and retest

      Keep the evidence, share the work list, and verify that each issue is actually gone.

    CHOOSE THE JOB

    Start with one comprehensive URL audit, then go deep

    You do not need to understand 28 tools first. Choose the job you need to finish today.

    01

    Audit one URL comprehensively

    Run nine modules covering technical SEO, performance, mobile, accessibility, content and AEO.

    Start this job
    02

    Find indexability blockers

    Check robots, noindex, canonical, sitemap, and response status evidence.

    Start this job
    03

    Generate structured data

    Build copy-ready JSON-LD with fewer markup errors and omissions.

    Start this job
    04

    Track SEO changes

    Document search-impacting changes and ship a report your team can review.

    Start this job

    DIAGNOSTIC PREVIEW / SAMPLE DATA

    More findings do not mean more insight

    SEO Lucas turns evidence into an actionable order of work instead of handing you another endless checklist.

    78/100

    Overall health

    Fix next

    03 FINDINGS
    1. 01High

      Canonical target mismatch

      May split indexing signals for the primary page.

    2. 02Medium

      5 images have no alt text

      Reduces content clarity and accessibility.

    3. 03Pass

      Structured data parses

      The evidence is saved and ready for review.

    SEO LUCAS ACADEMY

    Learn to read the evidence, not just follow a score

    Three paths move from search fundamentals to technical delivery and AI search, with a tool attached to every lesson.

    1. 01Search foundationsUnderstand crawling, indexing, metadata, and page signals.Start this path
    2. 02Technical SEOWork with rendering, architecture, performance, and schema.Start this path
    3. 03AEO & AI searchMake content easier for answer engines to understand, cite, and verify.Start this path

    COMMON QUESTIONS

    What you may want to know first

    Short answers about SEO, AEO, and the free diagnostic tools.

    01What is SEO?

    SEO (Search Engine Optimization) improves the content, structure, and technical signals that help search engines crawl, understand, and index a page — so the right people can find it.

    02What is AEO (Answer Engine Optimization)?

    AEO makes content easier for answer engines and AI search systems to understand and cite by clarifying entities, context, evidence, and answer structure.

    03Will the audit change my website?

    No. SEO Lucas only reads publicly available pages and technical signals, then organizes the evidence into a diagnostic report. It never signs in to or modifies your website.

    04What should I fix first after a free audit?

    Start with issues that block crawling, indexing, or identification of the primary page. Then address page signals and structured data. The report orders findings by impact so you do not have to chase the score alone.

    YOUR FIRST DIAGNOSTIC

    Start nine checks with one real URL.

    No project setup and no need to open every tool. Get a complete coverage record, then investigate what matters.

    Run comprehensive audit