Title
The title tag is an HTML title element critical to both SEO and user experience. It's used to briefly and accurately describe the topic and theme of an online document. Google typically displays the first 50-65 characters of a title tag or as many characters that fit into a 512-pixel display.
Scoring Information Source: LXRSEO Proprietary Algorithm - Analyzes the webpage URL Titles
Description
Meta descriptions are HTML attributes that provide concise explanations of the contents of webpages. They're commonly used on search engine result pages (SERP) to display preview snippets for a given page.
Scoring Information Source: LXRSEO Proprietary Algorithm - Analyzes the webpage URL Descriptions
Images
The alt tag is an image attribute used to describe the image. It's also very useful in helping search understand the description of the image.
Scoring Information Source: LXRSEO Proprietary Algorithm - Analyzes the Image Tags in the webpages
SEO Friendly URLs
To achieve a SEO-friendly URL, you must structure the URL in a way that helps your site achieve a higher search ranking and make it readable for both humans and Google's crawler.
Scoring Information Source: LXRSEO Proprietary Algorithm
Header tags help tell search engines what information is on your webpage. You can style heading tags to look differently. The number shows its level of importance. For example, H1 is more important than H2, H2 is more important than H3, and so on. You can also style H1 to a specific size, color, and font from an H2. This helps user experience; they can see the information in a hierarchy similar to an outline.
Scoring Information Source: LXRSEO Proprietary Algorithm - Analyzes the H1 Tags in the webpages
Keyword
A keyword is a word or phrase that is a topic of significance that helps visitors and search engines understand the purpose of your page.
Scoring Information Source: LXRSEO Proprietary Algorithm
Keyword Consistency
Keyword consistency helps your site rank higher on search results. Knowing what keywords to rank for and conducting keyword research is the first step to ranking higher on search engines. Knowing where to put keywords can help distribute, optimize, and provide consistency for search engines. Plus, it helps identify what your site is about and how to rank it.
Scoring Information Source: LXRSEO Proprietary Algorithm
Keyword Density
Keyword density is the amount of times a keyword appears within a page's content. A page with 1,000 words with keywords appearing 10 times will have a keyword density of 1%.
Scoring Information Source: LXRSEO Proprietary Algorithm
Mobile Friendly
Mobile users like to access the Internet from wherever and whenever they want. People browse from their smartphones due to a sense of urgency and/or not having access to a computer. A site that's not mobile-friendly can push visitors to alternative sites. Companies should develop websites that are responsive, easy to navigate, and accessible on any mobile device. That makes websites functional and easy to view on mobile.
Scoring Information Source: Google Mobile Friendly Test
Word Count
Search engines seek pages that contain text content that fulfills the goals of their visitors. The 50 word limit, while somewhat arbitrary, is in a reasonable range for what the engines appears to fulfill 'minimum' unique content in most cases.
Scoring Information Source: LXRSEO Proprietary Algorithm
Mobile Website
A mobile-friendly website is one that displays correctly on hand-held devices such as smartphones and tablets.
These are the main features:
Loads fast - bloated sites cost more money to access
Easy to read - mobile phone screens are 1/5th the size of desktop computers
Easy to navigate - menus have limited space on mobile devices
Minimal scrolling - not just vertically but also horizontally
Avoids using Flash - because Apple products don't support Flash
Scoring Information Source: LXRSEO Proprietary Algorithm
Mobile Viewport
A viewport controls how a webpage is displayed on a mobile device. Without a viewport, mobile devices will render the page at a typical desktop screen width, scaled to fit the screen. Setting a viewport gives control over the page's width and scaling on different devices.
Scoring Information Source: LXRSEO Proprietary Algorithm
Speed

Page speed in SEO refers to the speed in which a page loads. Better load times (closer to zero seconds) are preferred by search engines. Faster pages can help websites rank higher for search queries when compared to slower pages.

Google rewards faster websites so users associate their search engine with finding answers to their queries quickly. As long as Google can make everyone happy about their search results, people will continue to use their search engine and they'll be able to continue selling their ads, as well.

Scoring Information Source: WebDriver For Chrome
Desktop Speed
PageSpeed Insights measure the performance of a page for desktop devices to determine the amount of time it'll take to open.
Scoring Information Source: WebDriver For Chrome
Mobile Speed
PageSpeed Insights measure the performance of a page on mobile devices to determine the amount of time it'll take to open.
Scoring Information Source: WebDriver For Chrome
Optimization
7 of the best ways to speed up your website include:
1. Minimize HTTP requests
2. Reduce server response time
3. Enable compression
4. Enable browser caching
5. Minify JavaScript
6. Optimize images
7. Optimize CSS Delivery
Scoring Information Source: Google PageSpeed Insights
Page Size
When individuals refer to "page size," they're talking about the total size of a page, including all the elements used to create it. This includes the size of the defining HTML file, as well as other embedded objects (images, videos, etc.).
Scoring Information Source: LXRSEO Proprietary Algorithm
Total JavaScript Files
It's used to load website functionality related threads on a page.
Scoring Information Source: Google PageSpeed Insights
Total CSS Files
It's used to load the website styling on a page.
Scoring Information Source: Google PageSpeed Insights
An internal link is a normal hyperlink pointing from one page to another within the same domain. They help increase traffic to a website and allow users to navigate the website properly.
Scoring Information Source: Ahrefs
A backlink is an incoming hyperlink from one webpage to another webpage. Backlinks can also link from one website to another website.
Scoring Information Source: Ahrefs
Referring Domain
The referring domain is the domain that was visited before someone entered your site. Someone could have visited a site (example.com) and then clicked on a link to your site. Then, example.com would show up as a referring domain.
Scoring Information Source: Ahrefs
Do Follow
DoFollow links push SEO link juice and boost page ranking on the linked-to website. Essentially, they help in the Search Engine Results Page (SERP).
Scoring Information Source: Ahrefs
No Follow
NoFollow links do not push SEO link juice or boost page ranking on the linked-to website. Essentially, they don't help in the Search Engine Results Page (SERP).
Scoring Information Source: Ahrefs
A broken link is a link that gets clicked on or crawled by a search engine and results in an error. (Example, 404, 410, 503, etc.)
Scoring Information Source: LXRSEO Proprietary Algorithm
Structured Data
In terms of SEO, "structured data" refers to a type of markup on a webpage that provides additional information on the page's content. This markup helps search engines understand the meaning behind the content, which ultimately helps with relevancy. It also enables a site to benefit from enhanced results in SERPs through rich snippets, rich cards, carousels, knowledge boxes, etc.
Scoring Information Source: LXRSEO Proprietary Algorithm
Sitemap
Sitemaps are a list of pages within a website. An HTML sitemap is designed for humans for navigational purposes and can't be automatically updated. An XML sitemap is designed for search engines and can be automatically updated by setting up a frequency. This is helpful in linking the new posts with the webmaster tools automatically.
Scoring Information Source: LXRSEO Proprietary Algorithm
WWW Resolve
The WWW Resolve takes a few sentences to wrap your head around. It's a redirection command in the server's configuration file to either force "www." before the domain name or remove it. When you navigate to a website such as http://www.example.com, you might type that URL or you might type http://example.com. Several studies have found that around half of the users (in the study) use http://www.example.com and the other half use http://example.com. If you actually navigate to http://example.com, you will see that the URL immediately changes to http://www.example.com. That's a proper WWW Resolve. If you were able to navigate to both URL versions of a website's domain, and the URLs don't change, then the WWW Resolve is not implemented. While www.example.com uses WWW Resolve to force a redirection to the URL with www, it's also possible to force all www URLs to URLs without the www. How you implement the WWW Resolve is entirely up to you, but you should definitely use it.
Scoring Information Source: LXRSEO Proprietary Algorithm
AMP
An Accelerated Mobile Page (AMP) is an open source website publishing technology created by Google and Twitter to make mobile pages faster. HTML can slow down pages on mobile. As a result, AMP was created. Essentially, there are two versions of every page. One is the basic version and the other is the mobile version.
Scoring Information Source: LXRSEO Proprietary Algorithm
ROBOTS.TXT
Website owners use the /robots.txt file to give instructions about their website to web robots. This is called The Robots Exclusion Protocol.
Scoring Information Source: LXRSEO Proprietary Algorithm
Custom Error Page
Custom error pages are pages shown to your website visitors which match your website's theme when an error has occurred within your website. The error can be caused by different things, the most common of which is a 404 error.
Scoring Information Source: LXRSEO Proprietary Algorithm
Trust Indicator
Short for Web of Trust, WOT is an Internet browser service that helps identify websites that may be harmful to your computer. After installing this plug-in, if an unsafe website is opened, WOT displays a message indicating that the website is not safe and should be avoided. The picture shows an example of a WOT warning message. If you think the site is safe, this message can also be ignored.
Scoring Information Source: WOT
Traffic
Traffic is the amount of data sent and received by unique visitors and customers to your website. It's determined by the number of visitors and number of pages they visit.
Scoring Information Source: Alexa
Social
Social media platforms such as Facebook and Twitter allow you to create your company or personal profile to reach a wider audience online. Some businesses strive for viral posts to gain widespread attention.
Scoring Information Source: Facebook, Twitter, Google+, Pinterest
OpenMeta Graphs
Open Graph Tags are a great way to share a page's information using meta tags. Providing a useful and relevant page title, description, and images could attract visitors from social media platforms such as Facebook and Twitter to your page.
Scoring Information Source: LXRSEO Proprietary Algorithm
Blog
In the digital marketing world, content is king. Publishing your content on other sites is beneficial, but publishing it on your own site is much more effective. One of the best ways to do this is through a blog.
Scoring Information Source: LXRSEO Proprietary Algorithm