Seo Errors – All the Mistakes Made in Seo – 2020

Our struggle to keep our site alive against constant updates has now become a part of our daily life. In fact, our biggest challenge should be to protect our website health. This should be our priority and we should always work for it.

There should be priority monitoring to keep site health at good levels. There are several tools that you can check your site health. I personally use Ahrefs, SEMrush and Screaming Frog tools for this. Now let’s consider the SEO errors that most of us ignore and focus on improving them in the next process:

1. HTTP States and Server Errors

Steps You Should Follow: Screaming Frog> Response Codes> Filter:

screaming frog response codes
screaming frog response codes Seo Errors
  1. Redirection (3xx) – Redirects
  2. Client Error (404) – Broken Links
  3. Server Error (5xx) – Server Errors

In this section, you can access both faulty pages and visual links. Whether the connection is internal (internal) or external (external), this tool gives you clear information. I will also have an additional suggestion: Never inspect with a single tool. You can perform detailed analysis using SEMrush and Ahrefs Site Audit.

These issues not only cause traffic to be lost. Google may penalize you if it doesn’t think your website is suitable for the searcher.

2. Errors Affecting HTTP Status

  • 4xx Errors – 4xx codes indicate that a page is corrupt or inaccessible. It is also possible to encounter this type of code on employee pages that have been blocked from crawling.
  • Pages Not Scanned – This occurs for two different reasons. First, your site’s response time is over five seconds. Second, your server has blocked access to the page.
  • Broken Internal Links – These consist of links that direct users to a page that does not work. These will damage user experience and SEO.
  • Broken External Links – These consist of links that direct users to pages that are not located on another site and send negative signals to search engines.
  • Corrupted Internal Images – classified as such when an image file no longer exists or its URL is misspelled.
  • Other HTTP Status Errors:
    • Permanent Redirects (301)
    • Temporary Redirects (302)

3. Not Optimizing Meta Tags

Steps You Should Follow:

  1. Screaming Frog> Page Titles> Filter:
  2. Screaming Frog> Meta Description> Filter:
  3. Screaming Frog> H1> Filter:
screaming frog meta description
screaming frog meta description
  • Duplicate Title Tags
  • Duplicate Meta Annotations
  • Missing Meta Comments
  • Long Headlines
  • Missing H1
  • Missing ALT Tags
  • H1 and Title Similarities
  • Short Topics
  • Multiple H1 Tags

Meta tags help searchers identify the topics of your pages to link to keywords and phrases used by searchers.

Creating the right title tags means creating a unique and worthwhile link for users on the search engine results page.

Meta descriptions provide additional opportunities to add keywords and related phrases.

They should be as unique and adapted as possible. If you don’t create your own meta tags, Google will automatically generate them based on users’ queries. This can sometimes lead to search terms that cannot be matched and associated results.

Optimized title tags and meta descriptions should include the most appropriate keywords. They must also be of the correct length and avoid duplicate content as much as possible.

If it is possible to generate unique metadata, you can do so by maximizing your impact on the search engine result page.

Common Meta Tag Errors That Will Affect Your Ranking

  • Duplicate Title Tags and Meta descriptions – When there are two or more pages with the same titles and descriptions. This makes it difficult for search engines to accurately determine the relevance and ranking of the page.
  • Missing H1 Tags – H1 tags help search engines identify the subject of the content. If missing, there will be several gaps and disadvantages for Google to understand your site.
  • Missing Meta Descriptions – Well-written meta descriptions help Google understand the relevance of the page. They also encourage users to click on your result. If they are missing, your click rates may decrease.
  • Missing ALT Tags – ALT tags provide search engines and visually impaired people with a description of the images included in your content. Without them, the relevance of the page will be lost and the interaction may be damaged.
  • Duplicate H1 and Title Tags – When H1 tags and title tags are the same on any page, they may seem over-optimized. You may also lose your chances of ranking for other related keywords.
  • Other Common Meta Tag Errors:
    • Short / Long Headlines
    • Multiple H1 Tags

Creating Duplicate Content

You can perform this analysis with Ahrefs and SEMrush Audit.

Steps You Should Follow:

  • SEMrush> Project> Site Audit
  • Ahrefs> Site Audit
  • Duplicates – Duplicates
  • Duplicate Content – Duplicate content

Duplicate content has the capacity to damage the rankings you potentially have for a while.

Whether it is a direct competitor or not, you should avoid duplicating any content on any site.

Pay attention to the duplicate comments, paragraphs, and all parts of the copy. Check the H1 tags for duplicate content. Also try to check the same versions of a page like www and non-www.

It will be very important to pay attention to the uniqueness of every detail to make sure that a page is clickable not only in Google’s eyes but also in the eyes of users.

Copy Problems That Will Lose Performance

  • Copy Content – Site control tools mark duplicate content when pages on your site have the same URL or copy. You can add a rel = ”canonical” link to one of the duplicate content or consider 301 redirects.
  • Other Content Errors:
    • Duplicate H1 and Title Tags
    • Duplicate Meta Annotations

Not Optimizing Internal and External Links

  1. Links
  2. Broken Internal Links
  3. Broken External Links
  4. Links to HTTP Pages instead of HTTPS
  5. Underscores Used in URL

Links that direct your visitors to and from your customer journey can hurt your overall user experience and search performance. Google does not rank sites that offer a poor user experience.

In this study, it has been determined that there are problems in terms of both internal and external links close to half of the thousands of sites analyzed. This means that the links are not optimized individually.

Some links have an underscore in their URLs. Some have nofollow attributes. Some are HTTP, while HTTPS should be. This may affect your ranking.

You can find broken links using various site inspection tools. The next step will be to identify which ones have the greatest impact on the user’s interaction levels and correct them in order of priority.

Common Link Errors That Will Affect Your Ranking

  • Links to HTTP Pages on HTTPS Site – Links to legacy HTTP pages can lead to insecure communication between users and a server. For this reason, you should make sure that all your links are up to date.
  • URLs with Underline – Search engines may misinterpret underlines. In this case, the index of your site may be detected incorrectly. You should continue using dashes instead of underscores.
  • Other Link Errors:
    • Broken Internal Links
    • Broken External Links

Conditions That Make Browsers Difficult

  • Scannability Status
  • 4xx Errors
  • Broken Internal Links
  • Incorrect Pages Found in the Sitemap.xml File
  • Pages Not Scanned
  • Bad Internal Images
  • Unspecified Sitemap.xml in Robots.txt File
  • Broken External Links
  • Temporary Redirects
  • Nofollow Tags On Internal Links
  • Underscores Used in URL
  • Sitemap.xml File Not Found
  • Pages with Only One Internal Link
  • Orphaned Site Maps Pages
  • Permanent Redirects
  • Pages or Resources Blocked from Crawling
  • Pages with more than 3 clicks of page depth
  • External Resources Blocked in the Robots.txt File

Crawlability is one of the important health indicators of a site. If your site has indexing issues, it will be an indication that this site is unhealthy.

When it comes to your site being crawlable, it is gaining ground in the search engine result page. If you ignore any crawling issue from a technical SEO perspective, some pages on your site will not be as visible on Google as they should be.

However, if you fix crawl issues, Google is more likely to identify the right links for the right users on the search engine results page.

You should consider corrupt and blocked items that restrict your site for being crawlable. Thus, you can manage to avoid technical problems.

Common Problems For Site Browsers

  • Nofollow Tags on Internal Links – Internal links containing the Nofollow tag will block the flow of potential link value on your site.
  • Incorrect Pages Found in the Sitemap.xml File – Your Sitemap.xml file should not contain corrupt pages. Check for redirect chains and non-standard pages and make sure they provide 200 status codes in response.
  • No Sitemap.xml File – Missing sitemaps make it easy for search engines to discover, crawl and index the pages of your site.
  • Unspecified in robots.txt File Sitemap.xml – Without a link to sitemap.xml file in robots.txt, search engines cannot fully understand the structure of your site.
  • Other Common Crawl Errors Include:
    • Pages Not Scanned
    • Bad Internal Images
    • Broken Internal Links
    • URLs with Underline
    • 4xx Errors
    • External Resources Blocked in the robots.txt File
    • Scanning Blocking
    • Orphan Site Map Pages
    • Temporary Redirects

You can check most of the problems I mentioned above with Ahrefs and SEMrush. I recommend using trial versions of these tools to improve the health of your website.

Google Index Status

Ahrefs and SEMrush are among the tools that analyze these errors most accurately.

  • Indexing Status
  • Corruption of the Hreflang Attribute in the Source Code
  • Duplicate Title Tag
  • Duplicate Meta Annotations
  • Duplicate Content
  • Incorrect Herflang Connections
  • AMP Errors
  • Low Word Quantity
  • Missing Meta Description
  • Long Headlines
  • Missing H1
  • Missing ALT Tags
  • H1 and Title Similarities
  • Missing Herflang Tag
  • Multiple H1 Tags
  • Hreflang Problems

Good indexing is vital for SEO. Simply put, if a page is not indexed, it will not be seen by a search engine. Therefore, the relevant page will be invisible to the users.

Even if you don’t have any issues with crawlability, there are many factors that can prevent your site from being indexed. For example, duplicate metadata and content can make it difficult for search engines to determine which pages will be ranked on certain pages for specific search terms.

In this study, you can see that almost half of the sites that are checked and received data are struggling with indexing problems caused by duplicate title tags, descriptions and body contents.

This may mean that various problems arise, even if site administrators have the chance to see such problems in advance. For example, Google may be forced to decide which pages to rank.

You should be aware that a number of different issues can affect your site’s indexability. Especially low word quantity, hreflang deficiencies and bad hreflang quality for multilingual sites may cause problems.

Problems of Non-Indexable Sites

  • Short / Long Header Tags – Header tags longer than 60 characters are shortened in the search engine results page. Header tags under 60 characters may be overlooked for further optimization.
  • Hreflang Problems – If the herflang attributes of multilingual sites coincide with the source code of any page, it may confuse search engines.
  • Incorrect Herflang Links – For example, if relative URLs are used instead of absolute URLs, corrupt herflang links can cause indexing issues.
  • Low Word Quantity – You can see what pages with low word quantity are in the site inspection tools. So you should try to make sure they are as informative as possible.
  • Missing Hreflang – This issue occurs when a page on a multilingual site lacks the links or tags necessary to tell search engines what to offer to users in each region.
  • AMP Issues – This issue is related to your site’s mobile users. You may encounter such problems when the HTML code does not meet AMP standards.
  • Other common indexing errors include:
    • Duplicate H1
    • Duplicate Content
    • Duplicate Titles
    • Duplicate Meta Annotations
    • Missing H1 Tags
    • Multiple H1 Tags
    • Herflang Language Incompatibility

Forgetting Accelerated Mobile Pages (AMP) Technology

  • Mobile SEO
  • AMP HTML Problems

It is vital to make your site mobile compatible while doing on-site SEO studies. We know that mobile compatibility is the default ranking criterion for Google as of September 2020, for both mobile and desktop.

This means that, as site administrators, you need to make sure that your site’s HTML code is compliant with Google’s AMP guidelines to be mobile ready and to prevent damage to your search performance.

You can check for invalid AMP pages on your site using site inspection tools. So you can see what needs to be fixed. Maybe the problem may be in HTML files, maybe in style files or in the layout of your site.

Failure to Manage Site Performance

  • Site Performance
  • Slow page (HTML) loading speed
  • Un-reduced JavaScript and CSS files
  • Links to HTTP for HTTPS site
  • Uncached JavaScript and CSS files

Page loading time is becoming more and more important in SEO. The slower your site is, the less likely it is to interact with users who are patient to wait for it to load.

You can get page speed suggestions for mobile and desktop directly from Google. Learn how to measure page speed and identify opportunities to make your site faster.

Using site speed testing tools in conjunction with site inspection tools, you can uncover complex problems. For example, you can reveal problems in JavaScript and CSS files. Minimizing the site and reducing the code will be a quick gain for you.

Site Performance Issues

Slow page (HTML) Loading Speed – The time it takes for a page to be fully rendered by a browser is important. This time should be short enough not to directly affect your speed ranking.
Uncached JavaScript and CSS Files – This issue may depend on your page loading speed.

It also occurs if the browser caching time is not specified in the header section.
Non-Reduced JavaScript and CSS Files – This issue is related to the non-reduction of JavaScript and CSS files. Eliminate unnecessary lines, comments, and spaces to increase page loading speed.

Page Speed Terms and Solutions ,I recommend you to read

The healthiest tool you can check for the errors I shared above: Google Page Speed Insghts. You can check the speed performance of your web page with this tool. You can also measure the speed performance of your top traffic pages with Google Analytics.

Steps You Should Follow:

Google Analytics> Behavior> Site Speed> Speed Suggestions

What are the common SEO mistakes?

Copy Content Issues
Title Tag Problems
Meta Descriptions
Missing Sub-Tags and Broken Images
Low Text – HTML Rate
H1 Tag Problems
Broken Links
Excessive Internal Linking
Temporary Redirects
Incorrect Language Notifications
Low Word Count
Sitemap Issues
robots.txt Issues

How do I check my site for SEO errors?

Ahrefs and SEMrush are among the tools that analyze these errors most accurately.
Indexing Status
Corruption of the Hreflang Attribute in the Source Code
Duplicate Title Tag
Duplicate Meta Annotations
Duplicate Content
Incorrect Herflang Connections
AMP Errors
Low Word Quantity
Missing Meta Description
Long Headlines
Missing H1
Missing ALT Tags
H1 and Title Similarities
Missing Herflang Tag
Multiple H1 Tags
Hreflang Problems


The existence of any of these SEO errors can prevent your site from reaching its full potential. That is why it is very important to be aware of them as a site administrator with regular site audits.

You can use a checklist to prevent problems you experience, even if you experience crawling issues that prevent indexing of pages or duplicate content issues that risk potential penalties.

You should make it a habit to look at the SEO and user experience health of your site with tools like site audit tools. Thus, you will have a certain advantage in terms of search visibility. In line with this advantage, the user interaction of your site will increase positively.

Road Map

What about the mistakes after that?

The first thing we need to do after the site improves our health is content optimization. Writing our content long is not the solution! We should create our content based on the search behavior of users. Google will reward us if we understand the user’s search intent and produce very good content. Remember, Google doesn’t love our eyebrows. Google rewards whoever makes their visitors (customers) happy.

We produced the content. It is time to deliver these contents to more people. You can use your Social Media accounts, Google ADS and Social Media Advertising to make your content reach more visitors. Is it enough? That will not do. Constantly facing users who visit your site gives you brand awareness. This brand increases your search trends and causes you to be rewarded.

How do I produce content? How do I reach qualified users? How do I succeed? Do you need more? Then it’s time to visit

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