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 | -0.2 | 15209 | 1811 | 94 % | 91 % |
| 2 | Number of HTML Tags Size | -0.2 | 2741 | 960 | 95 % | 90 % |
| 3 | Clean Text Kilobytes Size | -0.2 | 87 | 11 | 90 % | 91 % |
| 4 | Word Count Size | -0.2 | 4133 | 1354 | 94 % | 90 % |
| 5 | Page Size Kilobytes Size | -0.18 | 705 | 187 | 94 % | 86 % |
| 6 | Number of Sentences Size | -0.18 | 687 | 79 | 92 % | 88 % |
| 7 | Number of P Tags Size | -0.18 | 166 | 36 | 88 % | 89 % |
| 8 | Number of Heading Tags Size | -0.18 | 59 | 21 | 90 % | 91 % |
| 9 | Number of Images with ALT Text Size | -0.17 | 87 | 20 | 84 % | 88 % |
| 10 | Number of Images Size | -0.17 | 106 | 29 | 89 % | 86 % |
| 11 | Number of Questions Size | -0.16 | 88 | 8 | 66 % | 85 % |
| 12 | Number of H3 Tags Size | -0.16 | 25 | 8 | 67 % | 88 % |
| 13 | Number of H2 Tags Size | -0.16 | 24 | 7 | 76 % | 89 % |
| 14 | Number of Questions In Headings Size | -0.16 | 8 | 2 | 36 % | 58 % |
| 15 | Inline JavaScript Kilobytes Size | -0.15 | 258 | 47 | 89 % | 84 % |
| 16 | Number of Prices Size | -0.14 | 590 | 41 | 71 % | 79 % |
| 17 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 21 % | 80 % |
| 18 | Inline CSS Kilobytes Size | -0.14 | 122 | 40 | 65 % | 81 % |
| 19 | Number of HREF Lang Tags Size | -0.13 | 15 | 2 | 11 % | 79 % |
| 20 | Number of Questions In H3 Tags Size | -0.13 | 5 | 1 | 16 % | 80 % |
| 21 | Number of HTML Comments Size | -0.13 | 196 | 32 | 77 % | 79 % |
| 22 | Number of H4 Tags Size | -0.12 | 17 | 4 | 43 % | 81 % |
| 23 | Average Words Per Sentence Size | -0.12 | 264 | 37 | 91 % | 69 % |
| 24 | Number of Images without ALT Text Size | -0.12 | 58 | 10 | 67 % | 77 % |
| 25 | Search Result URL Length Size | -0.12 | 112 | 61 | 98 % | 40 % |
| 26 | Number of H1 Tags Size | -0.12 | 7 | 2 | 82 % | 75 % |
| 27 | Search Result Summary Length Size | -0.12 | 182 | 150 | 96 % | 59 % |
| 28 | Word Count in Meta Description Size | -0.12 | 57 | 22 | 72 % | 70 % |
| 29 | Meta Description Length Size | -0.12 | 332 | 125 | 72 % | 69 % |
| 30 | Body Tag Size Kilobytes Size | -0.11 | 250 | 47 | 39 % | 96 % |
| 31 | Number of H5 Tags Size | -0.11 | 10 | 2 | 20 % | 74 % |
| 32 | Number of Questions In H4 Tags Size | -0.11 | 3 | 1 | 6 % | 70 % |
| 33 | Search Result Domain Length Size | -0.11 | 25 | 18 | 94 % | 56 % |
| 34 | Search Result Host Length Size | -0.11 | 25 | 18 | 94 % | 57 % |
| 35 | Title Word Count Size | -0.11 | 22 | 9 | 92 % | 59 % |
| 36 | Title Length Size | -0.1 | 120 | 58 | 92 % | 56 % |
| 37 | Number of H6 Tags Size | -0.1 | 13 | 1 | 10 % | 70 % |
| 38 | Bytes To First P Tag Size | -0.1 | 95503 | 57280 | 98 % | 57 % |
| 39 | Search Result Link Text Length Size | -0.1 | 58 | 50 | 98 % | 44 % |
| 40 | Number of Bytes to First Match Size | -0.09 | 9501282 | 745555 | 98 % | 52 % |
| 41 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 6 % | 49 % |
| 42 | Ahrefs Pages Size | -0.09 | 8 | 1 | 37 % | 39 % |
| 43 | Number of Questions In H5 Tags Size | -0.08 | 1 | 1 | 2 % | 54 % |
| 44 | Number of Schema Products Size | -0.08 | 11 | 1 | 4 % | 57 % |
| 45 | Head Size Kilobytes Size | -0.07 | 103 | 22 | 41 % | 89 % |
| 46 | Number of Questions In H6 Tags Size | -0.06 | 1 | 1 | 1 % | 41 % |
| 47 | Ahrefs Word Count Size | -0.04 | 3490 | 295 | 16 % | 36 % |
| 48 | Ahrefs Page Size Size | -0.03 | 66356 | 6415 | 16 % | 35 % |
| 49 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 32 % |
| 50 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 32 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 98 % |
