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 | 21738 | 1779 | 91 % | 91 % |
| 2 | Word Count Size | -0.2 | 8086 | 1351 | 91 % | 90 % |
| 3 | Clean Text Kilobytes Size | -0.2 | 111 | 11 | 87 % | 91 % |
| 4 | Number of HTML Tags Size | -0.19 | 3049 | 963 | 92 % | 90 % |
| 5 | Number of Sentences Size | -0.18 | 689 | 98 | 90 % | 91 % |
| 6 | Number of P Tags Size | -0.18 | 587 | 37 | 85 % | 90 % |
| 7 | Number of Heading Tags Size | -0.17 | 60 | 21 | 87 % | 89 % |
| 8 | Page Size Kilobytes Size | -0.17 | 679 | 204 | 92 % | 87 % |
| 9 | Number of Questions Size | -0.17 | 89 | 9 | 68 % | 88 % |
| 10 | Number of Images Size | -0.16 | 163 | 29 | 87 % | 85 % |
| 11 | Number of Images with ALT Text Size | -0.16 | 86 | 19 | 81 % | 86 % |
| 12 | Number of H2 Tags Size | -0.16 | 19 | 7 | 75 % | 89 % |
| 13 | Number of Questions In Headings Size | -0.16 | 7 | 2 | 37 % | 79 % |
| 14 | Number of H3 Tags Size | -0.16 | 29 | 8 | 67 % | 88 % |
| 15 | Inline JavaScript Kilobytes Size | -0.14 | 307 | 55 | 88 % | 84 % |
| 16 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 22 % | 84 % |
| 17 | Number of Prices Size | -0.13 | 1068 | 47 | 71 % | 77 % |
| 18 | Number of Questions In H3 Tags Size | -0.13 | 4 | 1 | 16 % | 80 % |
| 19 | Number of HTML Comments Size | -0.13 | 263 | 33 | 77 % | 77 % |
| 20 | Inline CSS Kilobytes Size | -0.13 | 154 | 47 | 65 % | 80 % |
| 21 | Number of H4 Tags Size | -0.12 | 24 | 4 | 43 % | 80 % |
| 22 | Number of HREF Lang Tags Size | -0.12 | 14 | 2 | 10 % | 78 % |
| 23 | Title Word Count Size | -0.12 | 19 | 9 | 89 % | 65 % |
| 24 | Number of Images without ALT Text Size | -0.12 | 116 | 10 | 67 % | 79 % |
| 25 | Search Result Domain Length Size | -0.12 | 27 | 18 | 91 % | 66 % |
| 26 | Search Result Host Length Size | -0.12 | 27 | 18 | 91 % | 67 % |
| 27 | Word Count in Meta Description Size | -0.12 | 101 | 21 | 70 % | 73 % |
| 28 | Average Words Per Sentence Size | -0.12 | 203 | 35 | 88 % | 70 % |
| 29 | Meta Description Length Size | -0.12 | 1390 | 124 | 70 % | 72 % |
| 30 | Number of H1 Tags Size | -0.12 | 4 | 2 | 80 % | 77 % |
| 31 | Title Length Size | -0.12 | 135 | 57 | 89 % | 64 % |
| 32 | Search Result Summary Length Size | -0.12 | 166 | 143 | 96 % | 56 % |
| 33 | Number of H5 Tags Size | -0.12 | 46 | 2 | 19 % | 75 % |
| 34 | Search Result Link Text Length Size | -0.1 | 59 | 50 | 98 % | 52 % |
| 35 | Number of H6 Tags Size | -0.1 | 10 | 1 | 10 % | 71 % |
| 36 | Number of Questions In H4 Tags Size | -0.1 | 3 | 1 | 6 % | 70 % |
| 37 | Search Result URL Length Size | -0.1 | 109 | 61 | 98 % | 44 % |
| 38 | Bytes To First P Tag Size | -0.09 | 86674 | 59925 | 99 % | 57 % |
| 39 | Number of Bytes to First Match Size | -0.08 | 6025518 | 788795 | 98 % | 50 % |
| 40 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 6 % | 54 % |
| 41 | Number of Questions In H5 Tags Size | -0.07 | 2 | 1 | 2 % | 63 % |
| 42 | Number of Schema Products Size | -0.07 | 7 | 1 | 4 % | 70 % |
| 43 | Number of Questions In H6 Tags Size | -0.05 | 1 | 0 | 1 % | 63 % |
| 44 | Ahrefs Pages Size | -0.04 | 11 | 1 | 17 % | 68 % |
| 45 | Body Tag Size Kilobytes Size | -0.03 | 187 | 12 | 10 % | 98 % |
| 46 | Ahrefs Word Count Size | -0.02 | 3324 | 110 | 6 % | 69 % |
| 47 | Head Size Kilobytes Size | -0.01 | 123 | 5 | 10 % | 97 % |
| 48 | Ahrefs Page Size Size | -0.01 | 56299 | 2372 | 6 % | 69 % |
| 49 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 67 % |
| 50 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 67 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 98 % |
