Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Unabridged Word Count Size | -0.2 | 28791 | 2030 | 92 % | 81 % |
| 2 | Clean Text Kilobytes Size | -0.2 | 163 | 13 | 88 % | 84 % |
| 3 | Word Count Size | -0.2 | 14792 | 1462 | 92 % | 80 % |
| 4 | Number of HTML Tags Size | -0.19 | 11043 | 1036 | 92 % | 81 % |
| 5 | Number of P Tags Size | -0.19 | 597 | 38 | 86 % | 81 % |
| 6 | Number of Sentences Size | -0.19 | 542 | 106 | 91 % | 80 % |
| 7 | Number of Heading Tags Size | -0.18 | 50 | 21 | 87 % | 81 % |
| 8 | Number of Questions Size | -0.18 | 146 | 9 | 69 % | 82 % |
| 9 | Number of Images Size | -0.18 | 295 | 32 | 87 % | 79 % |
| 10 | Page Size Kilobytes Size | -0.18 | 931 | 225 | 92 % | 81 % |
| 11 | Number of Images with ALT Text Size | -0.17 | 126 | 21 | 82 % | 83 % |
| 12 | Number of H2 Tags Size | -0.17 | 33 | 7 | 75 % | 80 % |
| 13 | Number of Questions In Headings Size | -0.17 | 8 | 2 | 36 % | 76 % |
| 14 | Number of H3 Tags Size | -0.16 | 34 | 8 | 66 % | 77 % |
| 15 | Inline JavaScript Kilobytes Size | -0.15 | 430 | 63 | 88 % | 76 % |
| 16 | Number of Questions In H2 Tags Size | -0.15 | 5 | 1 | 22 % | 74 % |
| 17 | Number of Questions In H3 Tags Size | -0.14 | 5 | 1 | 16 % | 71 % |
| 18 | Inline CSS Kilobytes Size | -0.14 | 131 | 48 | 65 % | 73 % |
| 19 | Number of HTML Comments Size | -0.14 | 391 | 36 | 78 % | 72 % |
| 20 | Number of Prices Size | -0.14 | 1614 | 55 | 72 % | 75 % |
| 21 | Number of Images without ALT Text Size | -0.13 | 222 | 11 | 67 % | 75 % |
| 22 | Number of HREF Lang Tags Size | -0.13 | 52 | 2 | 11 % | 74 % |
| 23 | Number of H4 Tags Size | -0.13 | 20 | 4 | 42 % | 72 % |
| 24 | Title Word Count Size | -0.13 | 16 | 9 | 89 % | 58 % |
| 25 | Meta Description Length Size | -0.12 | 690 | 122 | 68 % | 66 % |
| 26 | Word Count in Meta Description Size | -0.12 | 121 | 20 | 68 % | 64 % |
| 27 | Average Words Per Sentence Size | -0.12 | 299 | 37 | 89 % | 63 % |
| 28 | Title Length Size | -0.12 | 110 | 54 | 88 % | 55 % |
| 29 | Search Result Domain Length Size | -0.12 | 26 | 18 | 91 % | 60 % |
| 30 | Search Result Host Length Size | -0.12 | 26 | 18 | 91 % | 58 % |
| 31 | Number of H1 Tags Size | -0.11 | 5 | 2 | 80 % | 64 % |
| 32 | Search Result Link Text Length Size | -0.11 | 64 | 49 | 97 % | 50 % |
| 33 | Search Result URL Length Size | -0.1 | 463 | 62 | 98 % | 39 % |
| 34 | Number of H5 Tags Size | -0.1 | 11 | 2 | 18 % | 67 % |
| 35 | Number of Questions In H4 Tags Size | -0.1 | 3 | 1 | 5 % | 62 % |
| 36 | Search Result Summary Length Size | -0.1 | 164 | 147 | 95 % | 46 % |
| 37 | Number of H6 Tags Size | -0.1 | 7 | 1 | 9 % | 64 % |
| 38 | Bytes To First P Tag Size | -0.09 | 99320 | 61821 | 98 % | 53 % |
| 39 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 6 % | 51 % |
| 40 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 55 % |
| 41 | Number of Schema Products Size | -0.07 | 5 | 1 | 5 % | 66 % |
| 42 | Number of Bytes to First Match Size | -0.07 | 9923181 | 851536 | 98 % | 46 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 1 | 0 | 1 % | 57 % |
| 44 | Body Tag Size Kilobytes Size | -0.01 | 230 | 6 | 5 % | 86 % |
| 45 | Head Size Kilobytes Size | -0.01 | 93 | 2 | 4 % | 86 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 59 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 59 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 59 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 59 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 59 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 86 % |
