Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Ahrefs Word Count Size | -0.2 | 4493 | 1592 | 69 % | 17 % |
| 2 | Body Tag Size Kilobytes Size | -0.2 | 475 | 83 | 82 % | 90 % |
| 3 | Clean Text Kilobytes Size | -0.19 | 124 | 12 | 92 % | 86 % |
| 4 | Unabridged Word Count Size | -0.19 | 17546 | 1821 | 96 % | 90 % |
| 5 | Number of Sentences Size | -0.19 | 709 | 68 | 94 % | 90 % |
| 6 | Page Size Kilobytes Size | -0.18 | 564 | 151 | 96 % | 87 % |
| 7 | Number of P Tags Size | -0.18 | 152 | 40 | 90 % | 87 % |
| 8 | Number of HTML Tags Size | -0.18 | 2160 | 858 | 97 % | 85 % |
| 9 | Word Count Size | -0.17 | 15963 | 1850 | 96 % | 88 % |
| 10 | Number of Heading Tags Size | -0.17 | 94 | 22 | 93 % | 87 % |
| 11 | Number of Questions Size | -0.17 | 85 | 7 | 69 % | 87 % |
| 12 | Ahrefs Pages Size | -0.16 | 10 | 2 | 75 % | 22 % |
| 13 | Number of Images with ALT Text Size | -0.16 | 71 | 18 | 85 % | 86 % |
| 14 | Number of Images Size | -0.16 | 471 | 28 | 92 % | 86 % |
| 15 | Number of H2 Tags Size | -0.16 | 16 | 7 | 78 % | 88 % |
| 16 | Search Result Summary Length Size | -0.16 | 405 | 158 | 97 % | 62 % |
| 17 | Number of H3 Tags Size | -0.15 | 22 | 8 | 70 % | 85 % |
| 18 | Inline JavaScript Kilobytes Size | -0.15 | 430 | 31 | 91 % | 82 % |
| 19 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 24 % | 81 % |
| 20 | Number of Questions In Headings Size | -0.14 | 7 | 2 | 44 % | 27 % |
| 21 | Ahrefs Page Size Size | -0.14 | 61358 | 29694 | 71 % | 16 % |
| 22 | Number of Questions In H3 Tags Size | -0.13 | 12 | 1 | 17 % | 79 % |
| 23 | Inline CSS Kilobytes Size | -0.13 | 150 | 33 | 64 % | 78 % |
| 24 | Head Size Kilobytes Size | -0.13 | 164 | 44 | 91 % | 76 % |
| 25 | Number of Prices Size | -0.13 | 375 | 33 | 71 % | 71 % |
| 26 | Number of H4 Tags Size | -0.12 | 73 | 5 | 46 % | 76 % |
| 27 | Word Count in Meta Description Size | -0.12 | 69 | 22 | 72 % | 72 % |
| 28 | Number of HREF Lang Tags Size | -0.12 | 25 | 2 | 11 % | 74 % |
| 29 | Meta Description Length Size | -0.12 | 405 | 129 | 72 % | 72 % |
| 30 | Number of HTML Comments Size | -0.11 | 403 | 28 | 76 % | 75 % |
| 31 | Number of Images without ALT Text Size | -0.11 | 446 | 11 | 68 % | 75 % |
| 32 | Number of H1 Tags Size | -0.11 | 5 | 2 | 85 % | 65 % |
| 33 | Number of Questions In H4 Tags Size | -0.11 | 2 | 1 | 7 % | 68 % |
| 34 | Number of H5 Tags Size | -0.1 | 10 | 2 | 20 % | 71 % |
| 35 | Search Result URL Length Size | -0.1 | 112 | 61 | 97 % | 36 % |
| 36 | Title Word Count Size | -0.1 | 27 | 9 | 95 % | 58 % |
| 37 | Search Result Domain Length Size | -0.1 | 26 | 19 | 96 % | 53 % |
| 38 | Number of Schema Products Size | -0.1 | 4 | 1 | 4 % | 34 % |
| 39 | Search Result Host Length Size | -0.1 | 26 | 19 | 97 % | 53 % |
| 40 | Title Length Size | -0.1 | 192 | 59 | 94 % | 53 % |
| 41 | Number of Questions In H1 Tags Size | -0.1 | 1 | 1 | 7 % | 49 % |
| 42 | Average Words Per Sentence Size | -0.1 | 152 | 34 | 94 % | 59 % |
| 43 | Number of Questions In H5 Tags Size | -0.1 | 2 | 1 | 3 % | 47 % |
| 44 | Bytes To First P Tag Size | -0.1 | 74215 | 52692 | 98 % | 60 % |
| 45 | Search Result Link Text Length Size | -0.1 | 60 | 51 | 97 % | 51 % |
| 46 | Number of H6 Tags Size | -0.1 | 18 | 1 | 10 % | 69 % |
| 47 | Number of Questions In H6 Tags Size | -0.09 | 1 | 1 | 2 % | 30 % |
| 48 | Number of Bytes to First Match Size | -0.09 | 9935849 | 483453 | 95 % | 59 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 97 % |
