Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Clean Text Kilobytes Size | -0.26 | 70 | 12 | 59 % | 93 % |
| 2 | Word Count Size | -0.25 | 7427 | 1439 | 74 % | 93 % |
| 3 | Unabridged Word Count Size | -0.25 | 8335 | 1769 | 74 % | 94 % |
| 4 | Average Words Per Sentence Size | -0.23 | 232 | 30 | 64 % | 89 % |
| 5 | Number of Questions In Headings Size | -0.19 | 7 | 2 | 29 % | 87 % |
| 6 | Search Result URL Length Size | -0.18 | 87 | 63 | 83 % | 57 % |
| 7 | Search Result Summary Length Size | -0.18 | 153 | 146 | 83 % | 76 % |
| 8 | Search Result Domain Length Size | -0.18 | 24 | 17 | 73 % | 77 % |
| 9 | Search Result Host Length Size | -0.18 | 24 | 17 | 73 % | 76 % |
| 10 | Number of Sentences Size | -0.17 | 860 | 149 | 71 % | 78 % |
| 11 | Number of Questions In H2 Tags Size | -0.16 | 4 | 1 | 19 % | 85 % |
| 12 | Inline CSS Kilobytes Size | -0.16 | 274 | 60 | 57 % | 84 % |
| 13 | Number of Questions In H3 Tags Size | -0.16 | 5 | 1 | 15 % | 81 % |
| 14 | Page Size Kilobytes Size | -0.15 | 864 | 308 | 73 % | 48 % |
| 15 | Number of Questions Size | -0.14 | 72 | 13 | 59 % | 59 % |
| 16 | Inline JavaScript Kilobytes Size | -0.14 | 495 | 122 | 68 % | 41 % |
| 17 | Word Count in Meta Description Size | -0.14 | 63 | 19 | 60 % | 58 % |
| 18 | Meta Description Length Size | -0.13 | 354 | 119 | 60 % | 62 % |
| 19 | Number of Prices Size | -0.13 | 1044 | 103 | 59 % | 75 % |
| 20 | Title Word Count Size | -0.13 | 23 | 9 | 72 % | 55 % |
| 21 | Title Length Size | -0.13 | 168 | 56 | 72 % | 56 % |
| 22 | Number of Bytes to First Match Size | -0.11 | 9802996 | 1812097 | 84 % | 30 % |
| 23 | Search Result Link Text Length Size | -0.11 | 52 | 45 | 85 % | 42 % |
| 24 | Bytes To First P Tag Size | -0.1 | 93337 | 67371 | 85 % | 25 % |
| 25 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 3 % | 72 % |
| 26 | Number of Questions In H1 Tags Size | -0.06 | 1 | 1 | 3 % | 71 % |
| 27 | Number of Questions In H5 Tags Size | -0.05 | 1 | 1 | 1 % | 72 % |
| 28 | Number of Questions In H6 Tags Size | -0.02 | 1 | 0 | 0 % | 75 % |
| 29 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 30 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 31 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 32 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 82 % |
| 33 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 82 % |
| 34 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 96 % |
| 35 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |
| 36 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |