[taken from an SEO board]
On-Page Factors:
1) Page Title:
1.1) Keyword Density how often does the keyword show up?
1.2) Keyword Proximity what position in the title does it show up?
1.3) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
1.4) Keyword Relevance - is the keyword(s) relevant to the rest of the content on the page or the rest of the site.
1.5) Symbols are other symbols used to in the title to emphasize or delineate such as a vertical bar or comma?
1.6) Foreign are foreign characters used?
1.7) Unique Per Page is the title unique or is it the same on all pages of the site?
1.8) Unique Per Site is the title, in whole or format, duplicated from another site (specifically another highly ranked site in the same category or topic)?
1.9) Keyword Stuffing is the title informative or follow a natural site structure or is it simply a bunch of stuffed keywords?
2) Meta Keywords:
2.1) Keyword Density how often does the keyword show up?
2.2) Keyword Proximity what position in the Meta Keywords does it show up?
2.3) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
2.4) Keyword Relevance - is the keyword(s) relevant to the rest of the content on the page or the rest of the site.
2.5) Symbols are other symbols used to in the title to emphasize or delineate such as a vertical bar or comma?
2.6) Foreign are foreign characters used?
2.7) Unique Per Page is the Meta Keywords unique or is it the same on all pages of the site?
2.8) Unique Per Site is the Meta Keywords duplicated from another site (specifically another highly ranked site in the same category or topic)?
2.9) Keyword Count how many Meta Keywords are there? Over 5? Over 10? With too many keywords, does the page appear too generic and less relevant?
3) Meta Description:
3.1) Keyword Density how often does the keyword show up?
3.2) Keyword Proximity what position in the Meta Description does it show up?
3.3) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
3.4) Keyword Relevance - is the keyword(s) relevant to the rest of the content on the page or the rest of the site.
3.5) Symbols are other symbols used to in the title to emphasize or delineate such as a vertical bar or comma?
3.6) Foreign are foreign characters used?
3.7) Unique Per Page is the Meta Description unique or is it the same on all pages of the site?
3.8) Unique Per Site is the Meta Description duplicated from another site (specifically another highly ranked site in the same category or topic)?
3.9) Keyword Stuffing is the Meta Description a complete thought or sentence or is it a bunch of stuffed keywords?
4) TAGS
4.1) H1-H6: May not be looked at as much anymore but it probably still has some weight. If you are counting variables, you could multiply this group by 6 (the standard number of H tags).
4.1.1) Proximity - Is the tag towards the top of the page or buried at the bottom?
4.1.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.1.3) Word Count How many words are in the H tag? If the purpose is to be a Heading then a reasonable number of words should be expected. If there are 200 words in the H tag, then is it really a heading?
4.1.4) Content is there content that follows the heading? If you have 4 headings in a row then are they really describing anything?
4.1.5) Relevance does the heading accurately describe the subsequent content to follow?
4.1.6) Nesting - Is there a clear hierarchy structure of H tags? Does H2 come after H1 and so on?
4.1.7) Format is the CSS reducing the size and weight of the H tags? If so, how important is that H tag as a heading?
4.2) Bold/Strong Tags:
4.2.1) Keyword is the keyword bolded?
4.2.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.2.3) Word Count how many words are bolded? Like the H tags, if you have 200 words within the bold tags, does it really signify importance?
4.2.4) Legacy do they signify a difference between Bold and Strong?
4.2.5) Proximity where in the bolded set does the keyword appear?
4.2.6) Format is the CSS changing the weight of the bolded tags, thereby making them un-bolded?
4.3) Italic Tags:
4.3.1) Keyword is the keyword italicized?
4.3.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.3.3) Word Count how many words are italicized?
4.3.4) Proximity where in the italicized set does the keyword appear?
4.3.5) Format is the CSS shifting the font style back to normal?
4.4) Underline Tags:
4.4.1) Keyword is the keyword underlined?
4.4.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.4.3) Word Count how many words are underlined?
4.4.4) Proximity where in the underlined set does the keyword appear?
4.4.5) Format is the CSS shifting the font style back to normal?
4.5) Font Tags:
4.5.1) Keyword is the keyword within the font tag?
4.5.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.5.3) Font Parameters is the weight and size of the font changed rather than using other tags like H or Bold?
4.5.4) Font Color Type is the font using a standard description (i.e. black) or a hex color (#000000)?
4.5.5) Font Color Relation is the font color the same as the background color or is it within a given hex range to make it illegible?
4.5.6) Word Count how many words are within the font tag?
4.5.7) Proximity where in the font word set does the keyword appear?
4.5.8) Format is the CSS shifting the font style back to normal?
4.6) List Tags:
4.6.1) Keyword is the keyword within the list elements?
4.6.2) Keyword Accuracy is it the exact keyword/phrase or are there additional words included?
4.6.3) Word Count how many words are within the list elements?
4.6.4) List Count how many list elements <li> are there?
4.6.5) List Type is it an ordered or unordered list? If it is ordered does the order signify importance?
4.6.6) Proximity where in the list set does the keyword appear?
4.6.7) Format is the CSS editing or positioning the list in any way?
4.7) Paragraph Tags:
4.7.1) Paragraph Count how many paragraphs are there? Does you content appear choppy because you have a paragraph every other sentence?
4.7.2) Keyword Accuracy is the exact keyword/phrase found?
4.7.3) Implementation are <p> tags used correctly with an ending </p> and instead of the <br><br> combination?
4.7.4) Keyword is the keyword within the P tag?
4.7.5) Word Count how many words are within paragraphs?
4.7.6) Proximity where in the paragraph set does the keyword appear?
4.7.7) Context in what context does the keyword appear? Does the overall theme of the paragraph match that of the page and keyword? So if you have a site on gardening and a page on planting vegetables, it might tip off the search engine if suddenly there was a paragraph on motorcycles. Is it an ad? Was it paid for? What is it doing there?
4.7.8) Format is the CSS editing the paragraph in any way?
4.8) Span Tags:
4.8.1) Keyword is the keyword within the span tag?
4.8.2) Keyword Accuracy is the exact keyword/phrase found?
4.8.3) Word Count how many words are within the span tag?
4.8.4) Proximity where in the span word set does the keyword appear?
4.8.5) Format is the CSS editing or positioning the span tag in any way?
4.8.6) Background Color - if the background color of the contained text is changed (like to yellow to make it stand out) does that make it more important?
4.9) Div Tags:
4.9.1) Keyword is the keyword within the div tag?
4.9.2) Keyword Accuracy is the exact keyword/phrase found?
4.9.3) Word Count how many words are within the div tag?
4.9.4) Proximity where in the div word set does the keyword appear?
4.9.5) Format is the CSS editing or positioning the div tag in any way?
4.10) Comment Tags: I doubt they are looked at but it is a factor nonetheless.
4.10.1) Keyword is the keyword within the tag?
4.10.2) Keyword Accuracy is the exact keyword/phrase found?
4.10.3) Word Count how many words are within the tag?
4.10.4) Proximity where in the word set does the keyword appear?
4.10.5) Format is the CSS editing or positioning the div tag in any way?
4.11) Summary, Title, and Alt attributes: Summary are normally in tables, title tags are normally in links, and Alt tags are usually within images. All are used to describe elements but it has also been used to stuff keywords and who knows if this is seen as a positive or negative in the eyes of search engines.
4.11.1) Keyword is the keyword within the tag?
4.11.2) Keyword Accuracy is the exact keyword/phrase found?
4.11.3) Word Count how many words are within the tag?
4.11.4) Proximity where in the word set does the keyword appear?
4.11.5) Format is the CSS editing or positioning the div tag in any way?
4.12) Other Tags: (pre, xmp, dir, acronym, abbr, blockquote, caption, title ..) some of these are deprecated or obsolete.
4.12.1) Importance/Clarification most tags are used to signify importance of a word or group of words. Other times the tag is used to clarify what the containing text is such as the <title> or <acronym> tags. The search engines could look at any of these but for the sake of me not listing 50+ more tags, lets just say that many of the same variables may apply including Keyword, Word Count, Accuracy, Proximity, and Format.
4.13) Nested Tags: an example of this is: <b><i><u>text</u></i></b>
4.13.1) Compounded Importance if the keyword is nested within multiple tags does it make it any MORE important?
4.13.2) Over-emphasized can you over emphasize something in the eyes of the search engines?
5) Content/Text:
5.1) Content Block - is the content of the page located within a main element (like a complete article) or is it broken up (like short descriptions found on web results or news clippings)?
5.2) Content Block Number how many different content blocks are there? Does the use of multiple DIVs or Tables make the search engines treat each container as a separate block of content (even if it may not be displayed that way to the visitor)?
5.3) Content Length how long is the content? Too short and it may not be considered valuable. Too long and you might want to break it up into separate pages.
5.4) Content Relation is the content related to the keywords found in the Title, Meta and other tags?
5.5) Unique - is the content considered unique or is it duplicated from somewhere else? If it is duplicated is there a degree of infringement? Meaning, if it is a feed from the AP News Wire, it may not be as valuable as original content but it may not be valueless either.
5.6) Legibility - is the content legible or is it gibberish (like just a random set of words)?
5.7) Content Refresh:
5.7.1) Content Refresh Check - is the content on the page updated?
5.7.2) Content Refresh Frequency - how often does the content update?
5.7.3) Content Refresh Percentage - how much of the content updates?
5.7.4) Dynamic Content Check - does the content update TOO often (like every page load)?
6) Page Functionality/Attributes/Misc:
6.1) ActiveX does the page use ActiveX controls?
6.2) Validation does the page validate to w3c standards?
6.3) Java does the page have any Java Applets?
6.4) Javascript does the page use Javascript? What elements are affected?
6.5) Flash does the page use Flash?
6.6) Misspellings are there any misspellings or words not found in the unabridged dictionary? What is the percentage of misspellings?
6.7) Robots.txt does the page have a robots.txt file?
6.8) Other Meta Data does the page contain any additional meta data including geo information, author, or indexing parameters?
7) Site Functionality/Attributes/Misc:
7.1) Contact Info does the site have any contact info which may include a support form or email address and a physical address?
7.2) Sitemap does the site have a clear sitemap or a page that shows a hierarchy of the site.
7.3) SE Specific Sitemap does the site have a Google Sitemap, Yahoo Sitemap, etc.?
7.4) RSS feed does the site have an RSS file?
7.5) RSS Subscriptions how many people have subscribed to the RSS feed? Google, Yahoo, or MSN could track this in their own network.
8) On Page Links: Are all links created equal? If search engines are attempting to place a value on one link over another, here are a few things they may be looking at.
8.1) Link Section - are the links found within a Navigation or Footer element on a page? Is less value given to those links?
8.2) Internal Links - are the links internal to the domain?
8.3) Internal Link Percentage what percentage of the links on the page are internal links?
8.4) Internal Link Type are the links to internal pages text links or image links? What is the percentage of each?
8.5) Internal Cross Linking do the internal pages being linked to link back to the originating page?
8.6) External Links are the links leaving the site?
8.7) External Link Percentage what is the percentage of the links on the page that leave the site?
8.8) External Ad Links - are the links leaving the site to an ad network?
8.9) External Link Type - are the links leaving the site text links or image links? What is the percentage of each?
8.10) External Link Destination:
8.10.1) External Link Bad Destination - are you linking to a "bad neighborhood"? You can control who you link to and linking to a site that Google has banned or thinks is low quality might affect their view of your site.
8.10.2) External Link Good Destination - are you linking to an "Authority Site"? Is the Authority Site in your topic?
8.10.3) External Link Site Age what is the age of the external site you are linking to?
8.10.4) External Link Page Age what is the age of the external page you are linking to?
8.10.5) External Link Page PR what is the Page Rank of the external page you are linking to?
8.10.6) External Link Relevance is the external page you are linking on the same topic as the page that is linking?
8.10.7) External Link Text Relevance is the topic of the external page you are linking to match the link text used in the link?
8.10.8) External Link Hosting is the external page you are linking to located on the same IP address? A,B,C block? Hosting Provider?
8.10.9) External Link Meta are the Meta tags on the external page you are linking to similar to your page? Are they identical?
8.10.10 External Link Title is the Title of the external page you are linking to similar to your page? Is it identical?
8.10.11) External Link Domain does the domain name of the external site you are linking to use the same DNS server?
8.10.12) External Link Domain Age - was the domain you are linking to registered on the same day as your domain?
8.10.13) External Link Domain Life how long is the domain you are linking to registered for?
8.11) External Related Link - are the links leaving the site to another related site?
8.12) Content Links - are the links located within the content or do they stand alone?
8.13) List Links are the links located within a list tag? Is it an ordering list that might signify importance?
8.14) Emphasized Links is there any emphasis applied to the links using tags such as bold, italic, underline, or heading?
8.15) Link Count How many total links are there on the page?
8.16) Nofollow Links do the links have any nofollow attributes?
8.17) Javascript do the links use javascript?
8.18) Link Target what is the target for the link? Does it open a new window?
8.19) Link Age how old are the links? How old are they in relation to the age of the page?
8.20) Link Refresh have the links been updated? How often do they update? Every page load?
9) Page Rank/Indexing:
9.1) Page Rank - what is the page rank of the specific page?
9.2) Page Rank Growth Rate - how fast has the pages Page Rank increased?
9.3) Page Rank Contribution what percentage of the pages Page Rank came from internal pages or directly from external sources?
9.4) Home Page PR - what is the page rank of the site's home page? Not sure if this is a major factor but it could have a general "value" for the entire site that then passes to any sub-page located within that site. Meaning, would a page on CNN rank higher just because it is part of CNN?
9.5) Page Age - how long has the page been indexed?
9.6) Page Indexing History how many times has the page been indexed?
9.7) Page Indexing Frequency how often is the page indexed?
9.8) Page Indexing Speed how fast was the page indexed from the point where the site was first found?
9.9) Page Discovery how was the page discovered? Internal Sitemap? Internal link? External Link? RSS Feed? SE Submission? Blog Post?


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