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 | -0.21 | 34330 | 1888 | 90 % | 80 % |
| 2 | Word Count Size | -0.21 | 23151 | 1492 | 90 % | 80 % |
| 3 | Number of HTML Tags Size | -0.21 | 3880 | 1051 | 91 % | 79 % |
| 4 | Clean Text Kilobytes Size | -0.21 | 199 | 12 | 86 % | 89 % |
| 5 | Number of Sentences Size | -0.2 | 723 | 118 | 90 % | 78 % |
| 6 | Number of P Tags Size | -0.19 | 707 | 39 | 85 % | 78 % |
| 7 | Number of Heading Tags Size | -0.19 | 285 | 22 | 86 % | 78 % |
| 8 | Number of Questions Size | -0.19 | 137 | 9 | 68 % | 88 % |
| 9 | Number of Images Size | -0.18 | 719 | 32 | 86 % | 75 % |
| 10 | Number of Images with ALT Text Size | -0.18 | 522 | 22 | 81 % | 85 % |
| 11 | Number of H3 Tags Size | -0.18 | 41 | 8 | 67 % | 76 % |
| 12 | Number of H2 Tags Size | -0.17 | 27 | 7 | 76 % | 78 % |
| 13 | Page Size Kilobytes Size | -0.17 | 838 | 244 | 90 % | 82 % |
| 14 | Number of Questions In Headings Size | -0.17 | 13 | 2 | 36 % | 83 % |
| 15 | Inline JavaScript Kilobytes Size | -0.15 | 661 | 71 | 88 % | 78 % |
| 16 | Number of Questions In H3 Tags Size | -0.14 | 11 | 1 | 16 % | 79 % |
| 17 | Number of HTML Comments Size | -0.14 | 534 | 38 | 77 % | 69 % |
| 18 | Number of Questions In H2 Tags Size | -0.14 | 5 | 1 | 22 % | 79 % |
| 19 | Number of Prices Size | -0.14 | 463 | 52 | 74 % | 77 % |
| 20 | Number of H4 Tags Size | -0.14 | 237 | 4 | 42 % | 69 % |
| 21 | Word Count in Meta Description Size | -0.13 | 40 | 20 | 69 % | 66 % |
| 22 | Average Words Per Sentence Size | -0.13 | 340 | 38 | 87 % | 71 % |
| 23 | Title Word Count Size | -0.13 | 14 | 8 | 89 % | 65 % |
| 24 | Meta Description Length Size | -0.13 | 278 | 122 | 69 % | 72 % |
| 25 | Inline CSS Kilobytes Size | -0.13 | 195 | 53 | 66 % | 76 % |
| 26 | Number of Images without ALT Text Size | -0.13 | 198 | 11 | 66 % | 77 % |
| 27 | Number of HREF Lang Tags Size | -0.13 | 17 | 2 | 10 % | 78 % |
| 28 | Number of H1 Tags Size | -0.12 | 32 | 2 | 80 % | 68 % |
| 29 | Search Result Host Length Size | -0.12 | 25 | 18 | 90 % | 59 % |
| 30 | Search Result Domain Length Size | -0.12 | 25 | 18 | 90 % | 68 % |
| 31 | Title Length Size | -0.12 | 77 | 53 | 88 % | 61 % |
| 32 | Number of H5 Tags Size | -0.11 | 31 | 2 | 19 % | 64 % |
| 33 | Search Result URL Length Size | -0.11 | 106 | 61 | 98 % | 45 % |
| 34 | Search Result Summary Length Size | -0.1 | 168 | 149 | 96 % | 60 % |
| 35 | Number of Questions In H4 Tags Size | -0.1 | 12 | 1 | 6 % | 70 % |
| 36 | Number of H6 Tags Size | -0.1 | 13 | 1 | 10 % | 59 % |
| 37 | Bytes To First P Tag Size | -0.09 | 92904 | 63820 | 98 % | 56 % |
| 38 | Search Result Link Text Length Size | -0.09 | 58 | 44 | 98 % | 47 % |
| 39 | Number of Bytes to First Match Size | -0.08 | 9972490 | 842657 | 98 % | 50 % |
| 40 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 5 % | 59 % |
| 41 | Number of Questions In H5 Tags Size | -0.07 | 2 | 1 | 2 % | 63 % |
| 42 | Number of Schema Products Size | -0.06 | 16 | 1 | 3 % | 67 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 63 % |
| 44 | Body Tag Size Kilobytes Size | -0.01 | 242 | 3 | 2 % | 86 % |
| 45 | Head Size Kilobytes Size | -0 | 79 | 1 | 1 % | 86 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 67 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 67 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 67 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 67 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 67 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 85 % |
