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 Sentences Size | -0.17 | 2250 | 121 | 82 % | 84 % |
| 2 | Number of HTML Tags Size | -0.17 | 3019 | 1020 | 84 % | 85 % |
| 3 | Unabridged Word Count Size | -0.17 | 8976 | 1821 | 84 % | 85 % |
| 4 | Word Count Size | -0.17 | 6770 | 1462 | 84 % | 84 % |
| 5 | Clean Text Kilobytes Size | -0.17 | 70 | 12 | 80 % | 85 % |
| 6 | Number of Images Size | -0.17 | 334 | 30 | 80 % | 83 % |
| 7 | Number of P Tags Size | -0.17 | 211 | 39 | 79 % | 83 % |
| 8 | Number of Images with ALT Text Size | -0.17 | 152 | 20 | 75 % | 85 % |
| 9 | Page Size Kilobytes Size | -0.16 | 897 | 255 | 83 % | 84 % |
| 10 | Number of Questions Size | -0.16 | 84 | 11 | 66 % | 82 % |
| 11 | Number of H2 Tags Size | -0.16 | 22 | 7 | 71 % | 83 % |
| 12 | Number of Heading Tags Size | -0.16 | 68 | 22 | 80 % | 82 % |
| 13 | Inline JavaScript Kilobytes Size | -0.15 | 565 | 69 | 80 % | 81 % |
| 14 | Inline CSS Kilobytes Size | -0.15 | 265 | 64 | 63 % | 84 % |
| 15 | Search Result Host Length Size | -0.15 | 24 | 18 | 83 % | 76 % |
| 16 | Search Result Domain Length Size | -0.15 | 24 | 18 | 83 % | 77 % |
| 17 | Number of H1 Tags Size | -0.15 | 4 | 2 | 73 % | 81 % |
| 18 | Number of Questions In Headings Size | -0.14 | 9 | 2 | 37 % | 80 % |
| 19 | Number of H3 Tags Size | -0.14 | 31 | 9 | 63 % | 81 % |
| 20 | Search Result URL Length Size | -0.14 | 108 | 62 | 94 % | 55 % |
| 21 | Number of Prices Size | -0.14 | 2362 | 65 | 67 % | 84 % |
| 22 | Title Word Count Size | -0.14 | 19 | 8 | 82 % | 73 % |
| 23 | Word Count in Meta Description Size | -0.14 | 89 | 20 | 67 % | 75 % |
| 24 | Number of Images without ALT Text Size | -0.14 | 242 | 10 | 60 % | 80 % |
| 25 | Number of HTML Comments Size | -0.14 | 1230 | 45 | 75 % | 79 % |
| 26 | Title Length Size | -0.14 | 82 | 52 | 82 % | 73 % |
| 27 | Meta Description Length Size | -0.14 | 584 | 123 | 67 % | 77 % |
| 28 | Average Words Per Sentence Size | -0.13 | 234 | 34 | 80 % | 79 % |
| 29 | Number of Questions In H2 Tags Size | -0.13 | 5 | 1 | 22 % | 78 % |
| 30 | Number of H4 Tags Size | -0.12 | 19 | 4 | 38 % | 75 % |
| 31 | Number of Questions In H3 Tags Size | -0.12 | 5 | 1 | 16 % | 75 % |
| 32 | Number of HREF Lang Tags Size | -0.11 | 42 | 2 | 10 % | 69 % |
| 33 | Search Result Link Text Length Size | -0.11 | 55 | 45 | 95 % | 54 % |
| 34 | Search Result Summary Length Size | -0.11 | 263 | 153 | 94 % | 52 % |
| 35 | Number of H5 Tags Size | -0.11 | 31 | 2 | 18 % | 71 % |
| 36 | Number of H6 Tags Size | -0.1 | 10 | 1 | 10 % | 65 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 3 | 1 | 5 % | 69 % |
| 38 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 6 % | 63 % |
| 39 | Bytes To First P Tag Size | -0.08 | 99432 | 67000 | 95 % | 50 % |
| 40 | Number of Schema Products Size | -0.08 | 11 | 1 | 3 % | 70 % |
| 41 | Number of Bytes to First Match Size | -0.08 | 9917353 | 1300880 | 95 % | 34 % |
| 42 | Number of Questions In H5 Tags Size | -0.06 | 3 | 1 | 2 % | 65 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 2 | 0 | 1 % | 65 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 161 | 2 | 2 % | 94 % |
| 45 | Head Size Kilobytes Size | -0 | 72 | 1 | 2 % | 93 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 73 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 73 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 73 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 73 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 73 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 94 % |
