SEO Help Center

General SEO Information, Glossary of Terms etc.

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140 articles in this collection
Written by Simon Lesser and Marc Agate
Site Issues

X-robots noindex resources

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Written by Marc Agate
Updated over a week ago

Resources blocked by robots.txt

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Written by Marc Agate
Updated over a week ago

Twitter card description too long

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Written by Marc Agate
Updated over a week ago

Twitter card missing

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Written by Marc Agate
Updated over a week ago

Twitter card incomplete

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Written by Marc Agate
Updated over a week ago

Multiple Rel=Canonical Tags

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Written by Marc Agate
Updated over a week ago

Open Graph tags missing

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Written by Marc Agate
Updated over a week ago

Open Graph tags incomplete

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Written by Marc Agate
Updated over a week ago

Multiple hreflang languages referencing the same URL

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Written by Marc Agate
Updated over a week ago

Hreflang and HTML lang mismatch

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Written by Marc Agate
Updated over a week ago

Open Graph URL not matching canonical

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Written by Marc Agate
Updated over a week ago

Missing HTML lang value

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Written by Marc Agate
Updated over a week ago

Multiple URLs referenced for the same hreflang language

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Written by Marc Agate
Updated over a week ago

Hreflang to non-canonical

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Written by Marc Agate
Updated over a week ago

Non-reciprocal hreflang tag

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Written by Marc Agate
Updated over a week ago

Missing x-default hreflang

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Written by Marc Agate
Updated over a week ago

Redirecting hreflang link

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Written by Marc Agate
Updated over a week ago

Invalid HTML lang value

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Written by Marc Agate
Updated over a week ago

Broken hreflang link

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Written by Marc Agate
Updated over a week ago

No self-referencing hreflang tag

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Written by Marc Agate
Updated over a week ago

Empty or missing hreflang

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Written by Marc Agate
Updated over a week ago

Rel=Canonical Empty / Missing

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Written by Marc Agate
Updated over a week ago

Meta Robots NoFollow

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Written by Marc Agate
Updated over a week ago

Blocked by robots.txt

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Written by Marc Agate
Updated over a week ago

Blocked by X-Robots Tag

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Written by Marc Agate
Updated over a week ago

Blocked by Meta Robots

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Written by Marc Agate
Updated over a week ago

No Keywords in Body Text

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Written by Marc Agate
Updated over a week ago

Mixed Redirects

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Written by Marc Agate
Updated over a week ago

Invalid Characters in URL

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Written by Marc Agate
Updated over a week ago

No Links on Page

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Written by Marc Agate
Updated over a week ago

Meta Refresh Tag

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Written by Marc Agate
Updated over a week ago

Meta Keywords Too Long

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Written by Marc Agate
Updated over a week ago

Body Text Too Short

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Written by Marc Agate
Updated over a week ago

No Keywords in URL

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Written by Marc Agate
Updated over a week ago

Infinite / Looped Redirect

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Written by Marc Agate
Updated over a week ago

Redirect Chain

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Written by Marc Agate
Updated over a week ago

URL Too Long

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Written by Marc Agate
Updated over a week ago

Too Many URL Parameters

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Written by Marc Agate
Updated over a week ago

Too Many Links on Page

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Written by Marc Agate
Updated over a week ago

Duplicate Page Content

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Written by Simon Lesser
Updated over a week ago

No Keywords in Meta Keywords

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Written by Simon Lesser
Updated over a week ago

Invalid hreflang value

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Written by Marc Agate
Updated over a week ago

Invalid Content Type

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Written by Marc Agate
Updated over a week ago

Duplicate Meta Keywords

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Written by Simon Lesser
Updated over a week ago

Alt text too long

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Written by Marc Agate
Updated over a week ago

Meta Keywords Empty / Missing

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Written by Simon Lesser
Updated over a week ago

Alt text empty / missing

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Written by Marc Agate
Updated over a week ago

No Keywords in Headings

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Written by Simon Lesser
Updated over a week ago

Asset is linked via redirect

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Written by Marc Agate
Updated over a week ago

Multiple H1s

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Written by Simon Lesser
Updated over a week ago

Broken images

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Written by Marc Agate
Updated over a week ago

H1 Too Short

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Written by Simon Lesser
Updated over a week ago

H1 Empty / Missing

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Written by Simon Lesser
Updated over a week ago

No Keywords in Meta Description

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Written by Simon Lesser
Updated over a week ago

Multiple Meta Descriptions

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Written by Simon Lesser
Updated over a week ago

Meta Description Too Long

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Written by Simon Lesser
Updated over a week ago

Duplicate Meta Description

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Written by Simon Lesser
Updated over a week ago

Meta Description Empty / Missing

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Written by Simon Lesser
Updated over a week ago

No Keywords in Title

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Written by Simon Lesser
Updated over a week ago

Multiple Page Titles

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Written by Simon Lesser
Updated over a week ago

Title Too Short

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Written by Simon Lesser
Updated over a week ago

Title Too Long

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Written by Simon Lesser
Updated over a week ago

Duplicate Titles

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Written by Simon Lesser
Updated over a week ago

Title Empty / Missing

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Written by Simon Lesser
Updated over a week ago

5xx Error

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Written by Simon Lesser
Updated over a week ago

4xx Error

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Written by Simon Lesser
Updated over a week ago

3xx Redirect

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Written by Simon Lesser
Updated over a week ago

302 Redirect

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Written by Simon Lesser
Updated over a week ago
SEO Glossary of Terms

Dark Traffic

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Written by Simon Lesser
Updated over a week ago

Priority Score

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Written by Marc Agate
Updated over a week ago

Qihoo 360

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Written by Marc Agate
Updated over a week ago

Regular Expression

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Written by Marc Agate
Updated over a week ago

Mixed Redirect

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Written by Marc Agate
Updated over a week ago

Looped Redirect

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Written by Marc Agate
Updated over a week ago

Naver

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Written by Marc Agate
Updated over a week ago

H1 Tag

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Written by Marc Agate
Updated over a week ago

Yandex

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Written by Marc Agate
Updated over a week ago

Sogou

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Written by Marc Agate
Updated over a week ago

Spider

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Written by Marc Agate
Updated over a week ago

Meta Description

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Written by Marc Agate
Updated over a week ago

PPC

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Written by Marc Agate
Updated over a week ago

Meta Keywords Tag

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Written by Marc Agate
Updated over a week ago

HTTP Response Header

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Written by Marc Agate
Updated over a week ago

Robot

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Written by Marc Agate
Updated over a week ago

X-Robots Tag

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Written by Marc Agate
Updated over a week ago

Meta Robots Tag

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Written by Marc Agate
Updated over a week ago

JavaScript

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Written by Marc Agate
Updated over a week ago

Thin Content

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Written by Marc Agate
Updated over a week ago

Java (Java Applet)

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Written by Marc Agate
Updated over a week ago

Keyword Stuffing

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Written by Marc Agate
Updated over a week ago

Heading Tags (h1-h6)

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Written by Marc Agate
Updated over a week ago

Web Crawler

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Written by Marc Agate
Updated over a week ago

Infinite Redirect

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Written by Marc Agate
Updated over a week ago

HTTP Status Code

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Written by Marc Agate
Updated over a week ago

HTTP 200 (OK) Status

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Written by Marc Agate
Updated over a week ago

Crawl Budget

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Written by Marc Agate
Updated over a week ago

Dead End Page

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Written by Marc Agate
Updated over a week ago

Body Text

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Written by Marc Agate
Updated over a week ago

CMS (Content Management System)

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Written by Marc Agate
Updated over a week ago

Cloaking

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Written by Marc Agate
Updated over a week ago

Conversion

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Written by Marc Agate
Updated over a week ago

Baidu

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Written by Marc Agate
Updated over a week ago

Black Hat

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Written by Marc Agate
Updated over a week ago

AJAX

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Written by Marc Agate
Updated over a week ago

500 Internal Service Error

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Written by Marc Agate
Updated over a week ago

503 Service Unavailable Error

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Written by Marc Agate
Updated over a week ago

302 Temporary Redirect

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Written by Marc Agate
Updated over a week ago

De-Indexation

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Written by Marc Agate
Updated over a week ago

Canonical Page

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Written by Marc Agate
Updated over a week ago

Robots.txt

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Written by Marc Agate
Updated over a week ago

Rel="canonical" Tag

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Written by Marc Agate
Updated over a week ago

XML Sitemap

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Written by Marc Agate
Updated over a week ago

301 Permanent Redirect

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Written by Marc Agate
Updated over a week ago

Crawl

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Written by Marc Agate
Updated over a week ago

Title Tag

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Written by Marc Agate
Updated over a week ago

Static URL

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Written by Marc Agate
Updated over a week ago

Duplicate Content

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Written by Marc Agate
Updated over a week ago

Dynamic URL

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Written by Marc Agate
Updated over a week ago

SERP Snippet

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Written by Marc Agate
Updated over a week ago

HTML Head Element

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Written by Marc Agate
Updated over a week ago

Webspam

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Written by Marc Agate
Updated over a week ago

Click-Through Rate

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Written by Marc Agate
Updated over a week ago

Indexation

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Written by Marc Agate
Updated over a week ago

SERP

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Written by Marc Agate
Updated over a week ago

Index

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Written by Marc Agate
Updated over a week ago

Rel=next and Rel=prev Tags

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Written by Marc Agate
Updated over a week ago

Link Juice

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Written by Marc Agate
Updated over a week ago

URL Parameter

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Written by Marc Agate
Updated over a week ago

Nofollow attribute

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Written by Marc Agate
Updated over a week ago

Anchor Text

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Written by Marc Agate
Updated over a week ago

404 Not Found Error

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Written by Marc Agate
Updated over a week ago

Organic CTR

Organic CTR is the percentage of estimated clicks on a SERP that go to organic results
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Written by Simon Lesser
Updated over a week ago

Organic Difficulty

Organic Difficulty helps you to understand how hard it would be to rank on the top 10 organic positions.
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Written by Simon Lesser
Updated over a week ago

Dragon Rank

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Written by Simon Lesser
Updated over a week ago

Traffic Index

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Written by Simon Lesser
Updated over a week ago

Search Volume

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Written by Simon Lesser
Updated over a week ago

Preferred Landing Page

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Written by Simon Lesser
Updated over a week ago

Organic Visibility Score

Organic Visibility Score is a metric that quickly summarizes your organic ranking performance. Learn how it's calculated.
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Written by Simon Lesser
Updated over a week ago

Page Authority

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Written by Simon Lesser
Updated over a week ago

Domain Authority

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Written by Simon Lesser
Updated over a week ago