The presence/lack of an XML sitemap on the site.

The sitemap can inform search engines about available pages of the website by listing the pages' URLs along with optional additional info about each page, e.g. when it was last updated, how often it changes, and how important it is in relation to other pages.

The number of dead links on the webpage.

Broken links are links to pages that have become permanently unavailable. The presence of such links on a site may negatively impact user experience and signal to search engines that the site is neglected. Make sure to check your site for broken links regularly to stay user- and search engine-friendly.

The date when the page was last cached in Google, Bing, Yahoo or Yandex.

The character encoding used on the page.

Character encoding for a webpage is usually declared through an HTML meta tag and in the header. Without this information, a browser may not switch to the proper encoding, which can affect the readability of your content for both visitors and search engines. Try to always specify charset type for your pages to avoid confusing users and search engine crawlers.

This factor shows whether the encoding declared in the page's header is the same as the charset specified in the page's HTML meta tag.

To identify the encoding your page is using, search engines' crawlers may turn to both headers and the page's meta tag. To be certain the crawlers see your content the right way, make sure the correct encoding is specified in the page's header and in the HTML code.

The content type specified in the page's HTML meta tag.

Content type informs browsers what kind of content the page holds. For landing pages with textual content, the content type is normally "text/html".

The number of CSS errors found on the page.

CSS errors are errors in your Cascading Style Sheet, i.e. parts of your CSS that do not comply with CSS standards. If such errors are found on a page, visitors may have problems viewing the page, and search engine bots may have trouble crawling all or some parts of it.

This factor shows whether or not the page has more than one rel="canonical" tag.

Sometimes several pages of the same site may be holding the same content. To prevent these pages from being labeled as ones with duplicate content by search engines, the rel="canonical" HTML tag is used. The tag specifies the "preferred" version of a web page to give crawlers a hint of which page is to be indexed.

The number of pages on your site containing dynamic symbols in the URL.

Dynamically generated URLs are URLs with content that depends on variable parameters that are provided to the server. A dynamic URL can often be recognized by the presence of characters like "&", "?", and "=".

It was admitted by Google that dynamic sites are spidered slower than static sites. Additionally, unlike static URLs, dynamic URLs are not descriptive — so you cannot use your keywords in the URL, informing visitors and search engines what the page is about. Unless absolutely necessary, it's generally recommended that you try to avoid using such URLs.

The number of external links found on the page.

External links are links from a given page to other websites (as opposed to internal links, i.e. links leading to other pages of the same site).

This factor shows whether or not the website's www or non-www version is set as a priority version to prevent search engines from indexing two versions of the site.

Usually, websites are available with and without "www" in the domain name. This means links to the site can be leading to both www and non-www pages. Unless one of the versions of the site is set as a priority version, the same page with and without "www" will be considered by search engines as two different pages. You can set up and view the primary www or non-www version for your site using the .htaccess file or in Google Webmaster Tools.

The exact size of the HTML code of the page in kilobytes.

The response code received from the server when the page is loaded.

When someone makes a request to your server (like a user trying to access your page in a browser, or a search engine bot crawling your site), the server returns an HTTP status code in response to the request. This code provides information about the status of the request.

The number of internal links pointing to/coming from the page.

Internal links are links from a page the lead to pages on the same website, as opposed to external links (links pointing to pages on other sites).

An estimation of the SEO value of a link if it were placed on a certain page of your site. The value is calculated using SEO PowerSuite's own formula, with the page's Google PageRank (or Moz's Page Authority) and the number of links on the page taken into account. Broadly, a link with a value from 0 to 0,15 will hardly have any SEO value; a figure from 0,15 to 0,3 is considered to be a solid link value; and a link with a value over 0,3 has exceptional SEO value.

The number of links with a rel="nofollow" attribute on the page.

Nofollow links are links that search engines are instructed not to follow, i.e. such links do not have any SEO weight.

The number of visits the page has received over the last 30 days. The data is gathered from your Google Analytics account if login details have been provided.

The number of pages of your website that are restricted from indexing by the site's robots.txt file, a Noindex X-robots tag, or a Noindex Meta tag.

Pages restricted from indexing will not be crawled by search engine bots, so make sure you keep your landing pages indexable.

The number of pages with a 4xx HTML response code.

4xx errors usually point to a problem on a website, such as internal links set up incorrectly and leading users and search engine bots to non-existing pages. Keep an eye on these errors and try to fix them right away, as 4xx pages may lower your site's authority in users' and search engines' eyes.

The number of pages on the site with a 5xx HTML response code.

5xx errors indicate a server error when the server has failed to perform a valid request for some reason. Keep an eye on these errors, as their presence may lower the site's authority in search engines' eyes.

The number of pages on your site with over 100 outgoing links.

Google's mentioned keeping your links under 100 on a page is advisable. Having more than 100 links can result in a negative user experience, overwhelming your visitors; it can also make search engines believe the site is spammy or uses link schemes.

The number of pages of the website (if any) that use HTML frames.

HTML frames allow several HTML documents to be presented in the same browser window. Generally, using frames is not considered user- and search engine-friendly. Pages built with frames cannot be linked to, and the content of a frame cannot be indexed as part of the parent page (if at all).

Additionally, visitors are unable to bookmark framed pages, add them to favorites, or share their URLs. Try to avoid using frames when you can.

The factor shows the number of the site's pages that use meta refresh (if any).

Meta refresh instructs a browser to refresh the webpage automatically in a given period of time. It is not recommended that you use meta refresh unless it is absolutely necessary, as it may disorient users and confuse search engine crawlers.

The number of pages of the site (if any) with W3C errors and warnings (including both Validation and CSS Validation errors).

W3C errors and warnings on your pages may result in search engine bots being unable to crawl those pages adequately; they can also cause various issues in displaying your content in different browsers.

The presence/lack of a robots.txt file on your site.

The robots.txt file is used by websites to give instructions to web robots on whether or not specific folders and pages need to be scanned. With the help of this file, certain areas of a site can be closed from search engine crawlers.

The number of pages with the size of HTML code over 256kb.

Pages that are too big are slower to load. Page load speed is one of the major user experience factors, and an important ranking factor. When possible, try to keep your pages' size up to 256kb to ensure their user- and search engine-friendliness.

The number of pages whose URLs are over 115 characters long.

URLs that are up to 115 characters are easier to read by both visitors and search engines. It has been stated by Google that overly complex URLs can cause problems for crawlers, so try to avoid URLs over 115 characters long in order to keep your site user- and search engine-friendly.

The total number of links, both internal and external, found on the page.

The number of markup validation errors found on the page.

Markup validation is the process of checking a webpage's grammar and syntax. Validation errors may prevent search engines from crawling pages or parts of pages' content, and may mean that some of the content is not equally viewable in all browsers.

The number of images with missing alternative text on the page.

Alt text provides a description of the image to search engines or visitors who cannot see the image. It's recommended that you have alternative text for each of your images to stay both user- and search engine-friendly.

The number of target keywords (keywords you provided when starting content analysis) found within the page's <body> tag.

Having your keywords mentioned within the body of the page lets both search engines and visitors draw a connection between the page and the term. If possible, try to place your keywords closer to the beginning of the page for greater impact.

The number of words used within the page's <body> tag.

Both too much and too little textual content on your page may represent a problem to search engine bots. Very roughly, it is recommended that you keep your word count between 505 and 2884 words; however, recommendations vary from niche to niche, so it is best to look at competitor averages to get the optimum word count for your particular keyword niche.

The number of target keywords found in the page's alternative text.

Alt text is text associated with an image that conveys the same information as the image, particularly helpful in situations when the image is not available to the visitor. Alt text also describes the image to search engine bots.

The number of target keywords found in the page's bold text.

Words are usually bolded to give them additional emphasis; both visitors and search engines will most probably pay extra attention to the words in bold.

The number of target keywords found in the page's H1 tag.

The H1 tag is the heading of a page. It is recommended that you include your most important target keyword in the H1 tag — this will let search engines understand what the page is about.

The number of target keywords found in the page's H2-H6 tags.

H2-H6 tags are subheadings of a page, less important than the H1 tag. Use relevant keywords in these when you need to thematically divide your page's content into smaller sections.

The number of target keywords found in the page's italic text.

Italicized text can be used to give certain words additional emphasis. Search engines usually consider words in italics slightly more important than words with no additional markup.

The number of target keywords found in link anchor texts for outgoing links from the page.

Link anchor text is the clickable part of a link. While it's true that visitors and search engines are likely to attribute the meaning of a link's anchor text to the page the link is pointing to, remember that external links need to look natural and relevant within a page's content.

The number of pages on the site that have an empty or missing meta description tag.

The meta description is an important indication to search engines of what your page is about. Meta descriptions are often used as preview snippets for sites' listings in search results - so for pages with no meta descriptions, search engines will display the content they picked on their own in the snippet, which may not be appealing to searchers and lead to fewer visits to your site.

The number of target keywords found in the page's meta description tag.

When possible, try to naturally place important keywords towards the beginning of the page's meta description. It's also recommended that you keep your meta description relevant to the page's content and appealing to human searchers.

The number of pages of the site with identical meta desription tags.

It's recommended that you have unique meta descriptions for all of your site's pages — this will hint to search engines what the pages are about and which one is more relevant for a given query.

This factor indicates whether the page has more than one meta description tags.

If multiple meta descriptions are found on a page, search engines may be confused as to which one describes your pages best and which one is to be displayed in search results.

The length of the contents of the page's meta description tag in characters (with spaces).

It's advised that you keep your meta description up to 155 characters long. Descriptions that exceed this limit may get truncated by search engines for being too long to be displayed as part of the page's snippet in search results - thus failing to fully inform searchers of the page's contents.

The number of pages on your site that have meta descriptions over 155 characters long (with spaces).

When you can, make sure your meta descriptions stay up to 155 characters long, as longer ones may not fit into your page's preview snippet in search results and get truncated.

The number of target keywords found in the page's meta keywords tag.

In the past, the meta keywords tag was used by search engines as an indication of what the page is about. Today, the major search engines (like Google, Bing, and Yahoo) no longer pay attention to this tag, while some regional ones (like Baidu) still do.

The number of pages of the site that have an empty or missing title tag.

The contents of the title tag are commonly used by search engines as a snippet for your listing on their results pages. If the page has no title tag, search engines will show the content they've picked on their own, which may not be appealing to searchers and lead to fewer visits to your site.

The number of target keywords found in the page's title tag.

It's recommended that you place target keywords towards the beginning of the page's title. At the same time, try to keep the title relevant and appealing to human searchers, and never overuse keywords in it.

This factor indicates whether the page has more than one title tags.

To avoid confusion with search engines, make sure each of your pages only has one <title> tag.

The number of pages of the site with the same contents of the title tag.

It's good practice to have a unique title for every page of your website — this will let you avoid confusing search engines in determining which of the pages is most relevant for a given query.

The length of the contents of the page's title tag in characters (with spaces).

It is recommended that you keep your title tags relatively short (roughly, up to 55 characters long). Longer titles may not fit into your page's preview snippet in search results, thus failing to fully inform searchers of what the page is about.

The number of pages on your site that have titles over 55 characters long (with spaces).

When you can, make sure your titles stay up to 55 characters long, as longer titles may not fit into your page's preview snippet in search results and get truncated.