Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Clean Text Kilobytes Size | -0.2 | 53 | 12 | 89 % | 86 % |
| 2 | Unabridged Word Count Size | -0.2 | 9470 | 1898 | 92 % | 84 % |
| 3 | Word Count Size | -0.2 | 4046 | 1440 | 92 % | 83 % |
| 4 | Number of HTML Tags Size | -0.19 | 3766 | 1033 | 92 % | 83 % |
| 5 | Number of Sentences Size | -0.18 | 539 | 104 | 91 % | 82 % |
| 6 | Number of P Tags Size | -0.18 | 198 | 38 | 86 % | 82 % |
| 7 | Number of Heading Tags Size | -0.18 | 71 | 21 | 88 % | 82 % |
| 8 | Number of Questions Size | -0.17 | 144 | 9 | 69 % | 83 % |
| 9 | Page Size Kilobytes Size | -0.17 | 727 | 218 | 92 % | 84 % |
| 10 | Number of Images Size | -0.17 | 230 | 31 | 88 % | 80 % |
| 11 | Number of Images with ALT Text Size | -0.17 | 208 | 21 | 82 % | 83 % |
| 12 | Number of H2 Tags Size | -0.17 | 32 | 7 | 76 % | 81 % |
| 13 | Number of Questions In Headings Size | -0.16 | 9 | 2 | 37 % | 79 % |
| 14 | Inline JavaScript Kilobytes Size | -0.15 | 532 | 62 | 89 % | 79 % |
| 15 | Number of H3 Tags Size | -0.15 | 33 | 8 | 67 % | 78 % |
| 16 | Number of Questions In H2 Tags Size | -0.15 | 8 | 1 | 23 % | 77 % |
| 17 | Number of Prices Size | -0.14 | 397 | 50 | 73 % | 75 % |
| 18 | Number of HTML Comments Size | -0.14 | 355 | 38 | 79 % | 74 % |
| 19 | Inline CSS Kilobytes Size | -0.13 | 146 | 48 | 65 % | 77 % |
| 20 | Number of H4 Tags Size | -0.13 | 23 | 4 | 43 % | 73 % |
| 21 | Number of Questions In H3 Tags Size | -0.13 | 4 | 1 | 16 % | 72 % |
| 22 | Word Count in Meta Description Size | -0.13 | 204 | 21 | 70 % | 69 % |
| 23 | Meta Description Length Size | -0.13 | 1345 | 125 | 70 % | 70 % |
| 24 | Number of Images without ALT Text Size | -0.13 | 79 | 10 | 68 % | 73 % |
| 25 | Title Word Count Size | -0.12 | 18 | 9 | 90 % | 63 % |
| 26 | Search Result Domain Length Size | -0.12 | 25 | 18 | 92 % | 60 % |
| 27 | Search Result Host Length Size | -0.12 | 25 | 18 | 92 % | 59 % |
| 28 | Average Words Per Sentence Size | -0.12 | 287 | 38 | 89 % | 67 % |
| 29 | Title Length Size | -0.12 | 90 | 55 | 90 % | 62 % |
| 30 | Number of HREF Lang Tags Size | -0.12 | 18 | 2 | 11 % | 74 % |
| 31 | Search Result Summary Length Size | -0.12 | 172 | 147 | 95 % | 60 % |
| 32 | Number of H1 Tags Size | -0.11 | 5 | 2 | 80 % | 66 % |
| 33 | Number of H5 Tags Size | -0.11 | 12 | 2 | 19 % | 70 % |
| 34 | Search Result URL Length Size | -0.11 | 339 | 63 | 98 % | 42 % |
| 35 | Search Result Link Text Length Size | -0.1 | 58 | 49 | 98 % | 49 % |
| 36 | Number of Questions In H4 Tags Size | -0.1 | 2 | 1 | 6 % | 66 % |
| 37 | Number of H6 Tags Size | -0.1 | 9 | 1 | 10 % | 65 % |
| 38 | Bytes To First P Tag Size | -0.09 | 91317 | 60358 | 98 % | 59 % |
| 39 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 6 % | 51 % |
| 40 | Number of Bytes to First Match Size | -0.08 | 9971688 | 726621 | 98 % | 49 % |
| 41 | Number of Schema Products Size | -0.08 | 22 | 1 | 4 % | 62 % |
| 42 | Number of Questions In H5 Tags Size | -0.08 | 2 | 1 | 2 % | 60 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 1 | 0 | 1 % | 54 % |
| 44 | Body Tag Size Kilobytes Size | -0.02 | 213 | 10 | 8 % | 91 % |
| 45 | Head Size Kilobytes Size | -0.01 | 80 | 3 | 8 % | 90 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 58 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 58 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 58 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 58 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 58 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 91 % |
