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All issues

In the "All issues" section, you will find a detailed error report.
Errors are divided into four priorities, each of which is highlighted in a specific color:
Red — high priority errors. They pose the greatest danger to the site. Eliminating them is the top priority of an SEO optimizer or site owner.
Blue — errors with medium priority. They are less dangerous for the ranking of the site, but they seriously affect the level of the site's optimization.
Yellow — low priority errors. They have little effect on ranking, so you can start fixing them after more serious errors are fixed.
Green — informational errors, do not affect the site rating, but you should also pay attention to them.

The list of issue parameters is divided into logical blocks according to the errors that Serpstat issues the site for.
Response codes
Pages that give 5xx and 4xx response codes. If such errors are found on your site, the corresponding menu will have a gray checkbox. If no errors are found, the checkmark will be green. To get a detailed report on server response codes, open the corresponding menu. The report presents:
- Description of the problem and recommendations for its correction.
- Change graph in the number of errors.
- Problem page (for example, nonexistent page).
- The response code of this page.
- The number of pages on which links to a non-existent page were found. To view these pages, click on the corresponding column.

Meta tags 
Title is the title of the page that should concisely and accurately describe the content of the page (up to 70 characters).
Description  — a meta tag that contains a more detailed description of the page (but no more than 160 characters).
This metadata affects the ranking of the site and can participate in the formation of snippets  — the description of the site on the SERP. Make sure the meta tags are complete and that their content is unique.
Serpstat issues site meta tags for the following errors:
- duplicates of Title and Description;
- empty or missing Title / Description;
- lack of code;
- Title / Description length (too long or too short).

H1-H6 headings are used to structure the content of the page, each heading indicates the importance of the text that follows it. H1 is used to indicate the most important text, such as the title of an article. Each page must have one H1 heading, and the heading text must be unique within the site. H6 is the least important heading.
You must keep the heading sequence H1 to H6.
Serpstat issues headers for the three most important errors:
- missing heading H1;
- more than one H1 heading;
- incorrect order of H1-H6 headers.

Content and media
Issuing the content of the page for elements that violate the requirements of search engines. Lorem Ipsum is a nonsense text that programmers use to fill in page layouts. If it is present on a site page, the search engine may perceive it as irrelevant.
The body content is the content on the page. It is important for search engines as an indicator of page usefulness. The absence of text in the tag negatively affects the ranking.
Serpstat issues content for errors like this:
- pages with Lorem Ipsum;
- lack of text in the body;
- the page size is too large.

Site media components issue takes place in two directions:
- the presence of broken images;
- too large images.

Page indexing 
Indexing is the way of processing and classifying documents collected by search robots on a website. After processing, they are placed in the search engine database  — an index. If a page is missing from it, it will not appear in search results.
For a search robot to index a page, it must be open for indexing. Serpstat issues the site for the following errors:
- incorrectly set canonical meta tag;
- the presence of the iframe tag;
- pages hidden from indexing by the "no index" meta tag;
- pages with little text;
- flash elements on pages; canonical links lead to other domains;
- pages closed from indexing in robots.txt  — make sure that the correct pages are closed from indexing
- pages closed from indexing using the "no index" meta tag  — make sure that the correct pages are closed from indexing
- another page is specified in the canonical tag.

Links are an important indicator of a site's authority. The quality of the domain link mass affects its position in the search results. Serpstat issues links for the following errors:
- lack of favicon on site pages;
- too long URL;
- many GET parameters in the URL;
- too many outgoing links on the page;
- rel = "nofollow" attribute is used for internal links, or not used for external links.

Server parameters
Serpstat issues the site for the following errors:
- configured redirect to the site version without www;
- configured redirect from HTTP-version to HTTPS-version.

If your site contains language versions of the content, use the "hreflang" markup to indicate this to the search engine. Using this attribute helps the search engine understand the content in different languages ​​and show it in the relevant search results.

AMP Pages
AMP (Accelerated Mobile Pages) stands for Accelerated Mobile Pages. Sites using AMP load faster on mobile devices and rank first in mobile search results.

Open Graph and Twitter Card layouts are used to create an informative and presentable preview of your site on social networks and Twitter.
Micro-markup helps the search engine generate special snippets and recognize page content. It shows crawlers that text or other elements on the page are important and belongs to a specific data type.

Loading speed
Loading speed for computers and loading speed for mobile  — this section of the Audit shows the presence of errors that can affect the site’s loading pages speed.
Website page loading speed is an important ranking factor. Fast sites rank higher in the search results. Also loading speed affects user behavior.
Serpstat identifies loading speed issues and offers fixes for both desktop and mobile versions of the site. Data taken from Google PageSpeed ​​Insights tool.
Some of the parameters of the issue are:
- using the browser cache;
- use of JavaScript and CSS;
- optimization of images;
- readability of fonts.

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