Axandra posted this in their weekly search engine news. Very interesting to consider all the factors that can effect ranking!
Yahoos patent applications provides a list of 51 web page elements that can be analyzed to determine the clutter of a web page:
Total number of links
Total number of words
Total number of images (non-ad images)
Image area above the fold (non-ad images)
Dimensions of page
Page area (total)
Page length
Total number of tables
Maximum table columns (per table)
Maximum table rows (per table)
Total rows
Total columns
Total cells
Average cell padding (per table)
Average cell spacing (per table)
Dimensions of fold
Fold area
Location of center of fold relative to center of page
Total number of font sizes used for links
Total number of font sizes used for headings
Total number of font sizes used for body text
Total number of font sizes
Presence of tiny text
Total number of colors (excluding ads)
Alignment of page elements
Average page luminosity
Fixed vs. relative page width
Page weight (proxy for load time)
Total number of ads
Total ad area
Area of individual ads
Area of largest ad above the fold
Largest ad area
Total area of ads above the fold
Page space allocated to ads
Total number of external ads above the fold
Total number of external ads below the fold
Total number of external ads
Total number of internal ads above the fold
Total number of internal ads below the fold
Total number of internal ads
Number of sponsored link ads above the fold
Number of sponsored link ads below the fold
Total number of sponsored link ads
Number of image ads above the fold
Number of image ads below the fold
Total number of image ads
Number of text ads above the fold
Number of text ads below the fold
Total number of text ads
Position of ads on page
According to the patent application, Yahoo might also consider the presence of animated and flashing ads and the average ad luminosity.
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[Source: A Small Business Blog and Small Business Tips Related to Growing, Marketing and Managing a Small Business.]
