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 | -0.18 | 46360 | 2042 | 83 % | 88 % |
| 2 | Word Count Size | -0.18 | 10039 | 1523 | 83 % | 88 % |
| 3 | Clean Text Kilobytes Size | -0.17 | 232 | 13 | 75 % | 87 % |
| 4 | Number of P Tags Size | -0.17 | 300 | 41 | 74 % | 89 % |
| 5 | Number of Heading Tags Size | -0.17 | 78 | 22 | 75 % | 89 % |
| 6 | Number of Images Size | -0.17 | 239 | 31 | 76 % | 89 % |
| 7 | Number of Sentences Size | -0.16 | 836 | 125 | 81 % | 87 % |
| 8 | Number of HTML Tags Size | -0.16 | 3653 | 1000 | 84 % | 91 % |
| 9 | Number of H2 Tags Size | -0.16 | 24 | 7 | 68 % | 88 % |
| 10 | Number of Images with ALT Text Size | -0.16 | 122 | 21 | 71 % | 90 % |
| 11 | Number of H1 Tags Size | -0.15 | 4 | 1 | 69 % | 87 % |
| 12 | Number of H3 Tags Size | -0.15 | 51 | 9 | 60 % | 88 % |
| 13 | Number of Questions In Headings Size | -0.15 | 11 | 3 | 37 % | 87 % |
| 14 | Number of Questions Size | -0.15 | 257 | 13 | 66 % | 84 % |
| 15 | Meta Description Length Size | -0.14 | 190 | 117 | 67 % | 83 % |
| 16 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 25 % | 82 % |
| 17 | Search Result Domain Length Size | -0.14 | 25 | 17 | 84 % | 82 % |
| 18 | Search Result Host Length Size | -0.14 | 25 | 17 | 84 % | 82 % |
| 19 | Number of Images without ALT Text Size | -0.14 | 218 | 11 | 57 % | 82 % |
| 20 | Number of HTML Comments Size | -0.14 | 516 | 43 | 71 % | 88 % |
| 21 | Word Count in Meta Description Size | -0.14 | 58 | 19 | 67 % | 83 % |
| 22 | Title Length Size | -0.14 | 135 | 51 | 81 % | 80 % |
| 23 | Page Size Kilobytes Size | -0.14 | 770 | 290 | 82 % | 81 % |
| 24 | Inline CSS Kilobytes Size | -0.13 | 175 | 62 | 65 % | 84 % |
| 25 | Title Word Count Size | -0.13 | 18 | 8 | 81 % | 78 % |
| 26 | Average Words Per Sentence Size | -0.13 | 139 | 28 | 77 % | 82 % |
| 27 | Number of Questions In H3 Tags Size | -0.13 | 7 | 2 | 17 % | 83 % |
| 28 | Inline JavaScript Kilobytes Size | -0.13 | 406 | 105 | 79 % | 78 % |
| 29 | Number of H4 Tags Size | -0.12 | 13 | 4 | 37 % | 81 % |
| 30 | Number of Prices Size | -0.12 | 1963 | 74 | 67 % | 83 % |
| 31 | Number of HREF Lang Tags Size | -0.12 | 20 | 2 | 11 % | 68 % |
| 32 | Search Result Summary Length Size | -0.12 | 171 | 156 | 97 % | 63 % |
| 33 | Search Result URL Length Size | -0.11 | 92 | 61 | 98 % | 53 % |
| 34 | Number of H5 Tags Size | -0.11 | 20 | 2 | 17 % | 76 % |
| 35 | Number of H6 Tags Size | -0.1 | 12 | 1 | 9 % | 66 % |
| 36 | Search Result Link Text Length Size | -0.1 | 55 | 45 | 98 % | 54 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 5 % | 69 % |
| 38 | Bytes To First P Tag Size | -0.07 | 94167 | 71899 | 98 % | 38 % |
| 39 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 4 % | 62 % |
| 40 | Number of Bytes to First Match Size | -0.07 | 9908060 | 1470227 | 99 % | 27 % |
| 41 | Number of Questions In H5 Tags Size | -0.06 | 1 | 1 | 2 % | 69 % |
| 42 | Number of Schema Products Size | -0.06 | 5 | 1 | 3 % | 76 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 71 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 86 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 86 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 98 % |
| 50 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 98 % |
| 51 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 98 % |
