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 | -0.22 | 97 | 13 | 86 % | 90 % |
| 2 | Unabridged Word Count Size | -0.22 | 18105 | 1967 | 91 % | 80 % |
| 3 | Word Count Size | -0.22 | 8205 | 1539 | 91 % | 80 % |
| 4 | Number of HTML Tags Size | -0.21 | 4094 | 1029 | 92 % | 80 % |
| 5 | Number of Sentences Size | -0.2 | 782 | 120 | 91 % | 80 % |
| 6 | Number of P Tags Size | -0.2 | 207 | 40 | 85 % | 78 % |
| 7 | Number of Questions Size | -0.2 | 245 | 10 | 69 % | 89 % |
| 8 | Number of Heading Tags Size | -0.19 | 177 | 22 | 87 % | 78 % |
| 9 | Number of Images with ALT Text Size | -0.19 | 793 | 21 | 82 % | 88 % |
| 10 | Number of Images Size | -0.19 | 805 | 31 | 87 % | 78 % |
| 11 | Number of Questions In Headings Size | -0.19 | 14 | 2 | 36 % | 85 % |
| 12 | Number of H2 Tags Size | -0.17 | 81 | 7 | 76 % | 77 % |
| 13 | Page Size Kilobytes Size | -0.17 | 777 | 244 | 92 % | 86 % |
| 14 | Number of H3 Tags Size | -0.17 | 83 | 8 | 67 % | 76 % |
| 15 | Number of Questions In H2 Tags Size | -0.15 | 7 | 1 | 23 % | 83 % |
| 16 | Number of Questions In H3 Tags Size | -0.15 | 6 | 1 | 16 % | 82 % |
| 17 | Inline JavaScript Kilobytes Size | -0.15 | 534 | 68 | 89 % | 81 % |
| 18 | Word Count in Meta Description Size | -0.14 | 83 | 20 | 70 % | 67 % |
| 19 | Number of HTML Comments Size | -0.14 | 261 | 36 | 78 % | 70 % |
| 20 | Meta Description Length Size | -0.14 | 990 | 125 | 70 % | 77 % |
| 21 | Number of H4 Tags Size | -0.14 | 110 | 4 | 43 % | 70 % |
| 22 | Number of Prices Size | -0.14 | 944 | 55 | 72 % | 80 % |
| 23 | Inline CSS Kilobytes Size | -0.14 | 153 | 58 | 67 % | 82 % |
| 24 | Average Words Per Sentence Size | -0.14 | 217 | 37 | 88 % | 73 % |
| 25 | Number of H1 Tags Size | -0.13 | 31 | 2 | 79 % | 69 % |
| 26 | Number of HREF Lang Tags Size | -0.13 | 35 | 2 | 10 % | 78 % |
| 27 | Search Result Host Length Size | -0.13 | 26 | 18 | 91 % | 60 % |
| 28 | Title Word Count Size | -0.13 | 23 | 9 | 90 % | 70 % |
| 29 | Number of Images without ALT Text Size | -0.12 | 111 | 11 | 68 % | 80 % |
| 30 | Search Result Domain Length Size | -0.12 | 26 | 18 | 91 % | 69 % |
| 31 | Search Result URL Length Size | -0.12 | 103 | 61 | 99 % | 49 % |
| 32 | Title Length Size | -0.12 | 142 | 56 | 90 % | 66 % |
| 33 | Number of H5 Tags Size | -0.11 | 13 | 2 | 19 % | 65 % |
| 34 | Number of Questions In H4 Tags Size | -0.11 | 5 | 1 | 6 % | 71 % |
| 35 | Number of H6 Tags Size | -0.1 | 14 | 1 | 10 % | 62 % |
| 36 | Search Result Link Text Length Size | -0.1 | 56 | 44 | 99 % | 53 % |
| 37 | Bytes To First P Tag Size | -0.09 | 92291 | 62240 | 99 % | 55 % |
| 38 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 5 % | 62 % |
| 39 | Number of Schema Products Size | -0.08 | 10 | 1 | 3 % | 68 % |
| 40 | Search Result Summary Length Size | -0.08 | 168 | 153 | 98 % | 43 % |
| 41 | Number of Bytes to First Match Size | -0.08 | 9224031 | 714610 | 98 % | 45 % |
| 42 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 67 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 2 | 0 | 1 % | 65 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 168 | 1 | 1 % | 87 % |
| 45 | Head Size Kilobytes Size | -0 | 84 | 0 | 0 % | 87 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 69 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 69 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 69 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 69 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 69 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 87 % |
