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 | -0.17 | 83719 | 1866 | 82 % | 82 % |
| 2 | Word Count Size | -0.17 | 83529 | 1506 | 82 % | 81 % |
| 3 | Number of Images Size | -0.16 | 325 | 31 | 78 % | 80 % |
| 4 | Number of P Tags Size | -0.16 | 331 | 40 | 77 % | 79 % |
| 5 | Number of HTML Tags Size | -0.16 | 3257 | 1041 | 82 % | 82 % |
| 6 | Number of Sentences Size | -0.16 | 950 | 126 | 81 % | 82 % |
| 7 | Clean Text Kilobytes Size | -0.16 | 1215 | 13 | 77 % | 86 % |
| 8 | Number of Images with ALT Text Size | -0.16 | 308 | 21 | 73 % | 85 % |
| 9 | Number of H2 Tags Size | -0.15 | 39 | 7 | 69 % | 79 % |
| 10 | Number of Heading Tags Size | -0.15 | 107 | 22 | 77 % | 79 % |
| 11 | Inline CSS Kilobytes Size | -0.15 | 236 | 65 | 63 % | 84 % |
| 12 | Page Size Kilobytes Size | -0.15 | 1367 | 264 | 81 % | 84 % |
| 13 | Number of Questions Size | -0.15 | 111 | 11 | 64 % | 83 % |
| 14 | Number of Questions In Headings Size | -0.15 | 13 | 2 | 35 % | 83 % |
| 15 | Number of H1 Tags Size | -0.14 | 4 | 2 | 71 % | 78 % |
| 16 | Search Result Host Length Size | -0.14 | 25 | 18 | 81 % | 74 % |
| 17 | Search Result URL Length Size | -0.14 | 101 | 63 | 92 % | 57 % |
| 18 | Search Result Domain Length Size | -0.14 | 25 | 18 | 81 % | 79 % |
| 19 | Inline JavaScript Kilobytes Size | -0.14 | 495 | 75 | 78 % | 81 % |
| 20 | Number of H3 Tags Size | -0.14 | 87 | 9 | 61 % | 77 % |
| 21 | Word Count in Meta Description Size | -0.14 | 122 | 20 | 65 % | 72 % |
| 22 | Number of HTML Comments Size | -0.14 | 350 | 41 | 73 % | 80 % |
| 23 | Title Word Count Size | -0.14 | 25 | 8 | 80 % | 75 % |
| 24 | Title Length Size | -0.14 | 177 | 50 | 80 % | 75 % |
| 25 | Number of Images without ALT Text Size | -0.14 | 139 | 11 | 58 % | 82 % |
| 26 | Number of Prices Size | -0.14 | 648 | 60 | 65 % | 83 % |
| 27 | Meta Description Length Size | -0.14 | 795 | 119 | 65 % | 79 % |
| 28 | Number of Questions In H2 Tags Size | -0.13 | 6 | 1 | 21 % | 79 % |
| 29 | Average Words Per Sentence Size | -0.13 | 519 | 35 | 78 % | 76 % |
| 30 | Number of Questions In H3 Tags Size | -0.12 | 10 | 1 | 16 % | 78 % |
| 31 | Number of H4 Tags Size | -0.12 | 41 | 4 | 38 % | 74 % |
| 32 | Number of HREF Lang Tags Size | -0.12 | 27 | 2 | 11 % | 69 % |
| 33 | Number of H5 Tags Size | -0.11 | 25 | 2 | 19 % | 71 % |
| 34 | Search Result Link Text Length Size | -0.11 | 54 | 44 | 94 % | 55 % |
| 35 | Number of H6 Tags Size | -0.11 | 9 | 1 | 10 % | 65 % |
| 36 | Search Result Summary Length Size | -0.1 | 196 | 153 | 92 % | 51 % |
| 37 | Number of Questions In H4 Tags Size | -0.1 | 3 | 1 | 5 % | 72 % |
| 38 | Bytes To First P Tag Size | -0.09 | 92123 | 68202 | 93 % | 50 % |
| 39 | Number of Bytes to First Match Size | -0.09 | 9859672 | 1166517 | 93 % | 33 % |
| 40 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 4 % | 62 % |
| 41 | Number of Schema Products Size | -0.07 | 11 | 1 | 3 % | 71 % |
| 42 | Number of Questions In H5 Tags Size | -0.06 | 10 | 1 | 2 % | 67 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 2 | 0 | 1 % | 67 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 111 | 0 | 0 % | 92 % |
| 45 | Head Size Kilobytes Size | -0 | 69 | 0 | 0 % | 92 % |
| 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 % | 92 % |
