Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Number of Images Size | -0.18 | 128 | 29 | 78 % | 87 % |
| 2 | Number of Images with ALT Text Size | -0.17 | 105 | 20 | 74 % | 89 % |
| 3 | Number of P Tags Size | -0.17 | 122 | 36 | 77 % | 88 % |
| 4 | Number of HTML Tags Size | -0.17 | 3192 | 1213 | 85 % | 88 % |
| 5 | Number of Heading Tags Size | -0.16 | 53 | 21 | 78 % | 86 % |
| 6 | Word Count Size | -0.16 | 4259 | 1373 | 85 % | 85 % |
| 7 | Unabridged Word Count Size | -0.16 | 4792 | 1739 | 85 % | 87 % |
| 8 | Clean Text Kilobytes Size | -0.16 | 112 | 12 | 78 % | 86 % |
| 9 | Number of H1 Tags Size | -0.16 | 3 | 2 | 72 % | 88 % |
| 10 | Number of HTML Comments Size | -0.16 | 981 | 44 | 75 % | 89 % |
| 11 | Number of H2 Tags Size | -0.15 | 18 | 7 | 68 % | 87 % |
| 12 | Average Words Per Sentence Size | -0.14 | 166 | 32 | 80 % | 82 % |
| 13 | Number of H3 Tags Size | -0.14 | 23 | 8 | 60 % | 81 % |
| 14 | Number of Sentences Size | -0.14 | 439 | 119 | 83 % | 81 % |
| 15 | Title Word Count Size | -0.13 | 13 | 8 | 83 % | 77 % |
| 16 | Search Result Domain Length Size | -0.13 | 26 | 17 | 85 % | 79 % |
| 17 | Search Result Host Length Size | -0.13 | 26 | 17 | 85 % | 79 % |
| 18 | Number of Images without ALT Text Size | -0.13 | 59 | 9 | 58 % | 80 % |
| 19 | Number of H4 Tags Size | -0.13 | 16 | 4 | 39 % | 80 % |
| 20 | Title Length Size | -0.13 | 85 | 49 | 83 % | 78 % |
| 21 | Number of Prices Size | -0.13 | 278 | 61 | 69 % | 82 % |
| 22 | Word Count in Meta Description Size | -0.13 | 48 | 20 | 67 % | 78 % |
| 23 | Number of Questions In Headings Size | -0.13 | 7 | 2 | 34 % | 76 % |
| 24 | Meta Description Length Size | -0.13 | 309 | 123 | 68 % | 78 % |
| 25 | Page Size Kilobytes Size | -0.12 | 791 | 310 | 84 % | 77 % |
| 26 | Number of Questions Size | -0.12 | 25 | 10 | 68 % | 75 % |
| 27 | Number of Questions In H2 Tags Size | -0.12 | 4 | 1 | 20 % | 78 % |
| 28 | Search Result Summary Length Size | -0.12 | 162 | 151 | 96 % | 60 % |
| 29 | Inline CSS Kilobytes Size | -0.12 | 194 | 56 | 63 % | 66 % |
| 30 | Number of HREF Lang Tags Size | -0.11 | 44 | 2 | 12 % | 75 % |
| 31 | Search Result URL Length Size | -0.11 | 87 | 61 | 97 % | 53 % |
| 32 | Inline JavaScript Kilobytes Size | -0.11 | 388 | 102 | 82 % | 75 % |
| 33 | Number of Questions In H3 Tags Size | -0.11 | 4 | 1 | 15 % | 70 % |
| 34 | Number of H6 Tags Size | -0.1 | 5 | 1 | 8 % | 66 % |
| 35 | Number of H5 Tags Size | -0.1 | 34 | 2 | 17 % | 70 % |
| 36 | Search Result Link Text Length Size | -0.09 | 52 | 42 | 96 % | 50 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 5 % | 62 % |
| 38 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 64 % |
| 39 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 3 % | 56 % |
| 40 | Number of Bytes to First Match Size | -0.07 | 9724870 | 1518737 | 96 % | 28 % |
| 41 | Number of Schema Products Size | -0.07 | 11 | 1 | 4 % | 63 % |
| 42 | Bytes To First P Tag Size | -0.06 | 90015 | 67164 | 96 % | 28 % |
| 43 | Number of Questions In H6 Tags Size | -0.02 | 1 | 0 | 0 % | 60 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 64 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 64 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 64 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 64 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 64 % |
| 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 % | 99 % |
