The most common of all is 500 and is the one that you have to take into account the most. If the server is down, no one can access your website, including Google.
This indicates that it will start removing your URLs from its results little by little.
This is a technique that some Black SEO companies use to make you disappear from Google if they can't get you.
This error must be resolved as quickly as possible.
Normally, restarting the server should be enough but this is not the case in all cases.
This is where backups come into play.
I recommend that if for some reason nothing works, the quickest way to fix it is to not focus all your efforts on trying to fix whatever is wrong with the server and use the backup on another server that does work.
Then, all you have to do is change the DNS (where the server that has the website is registered) to point to the new one.
Once everything is resolved, you will have time to see what happens to the old server.
Robots.txt file has format errors
This is a file of vital importance in SEO and a great unknown to many.
A good setup is so important that it is something you should always leave to an SEO expert.
This file can be used in many ways, as it has two main functions: to tell Google what it can and cannot include in its results, as well as to define who can access your website and who cannot.
By configuring access to information (URL or paths) you will be able, above all, to avoid duplicate or low-quality content in Google results, thus making the search engine focus on important information.
An example: if you only have one author on your Wordpress blog and you use this command line “Disallow: /author/” you will avoid duplication with the main category and if you use “Disallow: /comments/” you will avoid comments from being indexed outside the page on which they were generated or if you use this other one “Disallow: /*?s=” you will avoid any evil SEO from using it to flood Google with irrelevant results.
In 2019, Google advised that a noindex be included in such URLs.
By defining who has and who does not have access, you will prevent these "bots" or robots from consuming data from your server, but most importantly, you will have more accurate data on your direct and referral traffic in Google Analytics.
I don't want you to understand that there is only one correct configuration for this file.
Each SEO strategy pursues certain objectives, which is why each domain - regardless of the CMS - contains a different configuration.
A tip, in Search Console you have a tool to see if this file has any kind of error.
Likewise, if you make any kind of modification to this file, it is highly recommended that you click “test” in this tool so that Google is aware that a modification has occurred.
Internal links are broken
This error indicates that within our domain there are links to other points of our domain that have been deleted or whose URL has been modified.
This will create usability problems (user experience) for users and will cause number code philippines Google problems when indexing your content, since Google relies on internal links to know what content exists.
Ls that are marked and modify the link to a correct point.
Wrong pages found in sitemap.xml
This error indicates that something is wrong with our sitemaps.
A sitemap is nothing more than a document in which we indicate to Google what URLs we have within our domain, hence the importance of it being perfect.
The most common errors are:
It does not contain all the URLs of our domain.
Contains URLs that are not within our domain.
Contains duplicate URLs.
Contains characters that make its content unreadable.
They have a weight (KB) greater than the time Google spent crawling them.
It is important to include sitemaps in robots.txt and include sitemaps in Search Console for better indexing.
There are different strategies that we can use to get better SEO performance, but the most common strategy is segmentation and specification.