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 | -0.18 | 19698 | 1903 | 90 % | 83 % |
| 2 | Word Count Size | -0.18 | 9787 | 1516 | 90 % | 83 % |
| 3 | Clean Text Kilobytes Size | -0.18 | 105 | 13 | 85 % | 89 % |
| 4 | Number of HTML Tags Size | -0.18 | 4734 | 1033 | 90 % | 83 % |
| 5 | Number of Sentences Size | -0.18 | 837 | 118 | 89 % | 84 % |
| 6 | Number of P Tags Size | -0.17 | 205 | 40 | 84 % | 81 % |
| 7 | Number of Questions Size | -0.17 | 82 | 10 | 71 % | 87 % |
| 8 | Number of Heading Tags Size | -0.16 | 81 | 22 | 85 % | 81 % |
| 9 | Number of Images Size | -0.16 | 381 | 32 | 85 % | 80 % |
| 10 | Number of Images with ALT Text Size | -0.16 | 372 | 21 | 80 % | 86 % |
| 11 | Number of H2 Tags Size | -0.16 | 28 | 7 | 75 % | 80 % |
| 12 | Page Size Kilobytes Size | -0.15 | 714 | 257 | 90 % | 86 % |
| 13 | Number of H3 Tags Size | -0.15 | 44 | 8 | 66 % | 80 % |
| 14 | Number of Questions In Headings Size | -0.15 | 9 | 2 | 39 % | 82 % |
| 15 | Number of Prices Size | -0.13 | 769 | 57 | 72 % | 79 % |
| 16 | Inline JavaScript Kilobytes Size | -0.13 | 334 | 78 | 87 % | 81 % |
| 17 | Number of Questions In H3 Tags Size | -0.13 | 5 | 1 | 17 % | 78 % |
| 18 | Inline CSS Kilobytes Size | -0.13 | 173 | 57 | 68 % | 79 % |
| 19 | Number of Questions In H2 Tags Size | -0.13 | 5 | 1 | 24 % | 78 % |
| 20 | Number of HTML Comments Size | -0.13 | 403 | 39 | 76 % | 75 % |
| 21 | Number of H1 Tags Size | -0.13 | 11 | 2 | 78 % | 72 % |
| 22 | Number of Images without ALT Text Size | -0.13 | 98 | 11 | 65 % | 79 % |
| 23 | Average Words Per Sentence Size | -0.12 | 223 | 38 | 86 % | 74 % |
| 24 | Meta Description Length Size | -0.12 | 467 | 124 | 71 % | 73 % |
| 25 | Number of H4 Tags Size | -0.12 | 19 | 4 | 42 % | 71 % |
| 26 | Word Count in Meta Description Size | -0.12 | 78 | 20 | 71 % | 69 % |
| 27 | Title Word Count Size | -0.12 | 15 | 8 | 89 % | 70 % |
| 28 | Number of HREF Lang Tags Size | -0.12 | 26 | 2 | 10 % | 74 % |
| 29 | Title Length Size | -0.11 | 93 | 53 | 88 % | 67 % |
| 30 | Search Result Host Length Size | -0.11 | 26 | 18 | 89 % | 66 % |
| 31 | Search Result Domain Length Size | -0.11 | 26 | 18 | 89 % | 70 % |
| 32 | Number of H5 Tags Size | -0.11 | 26 | 2 | 20 % | 65 % |
| 33 | Number of H6 Tags Size | -0.1 | 13 | 1 | 11 % | 63 % |
| 34 | Search Result Summary Length Size | -0.1 | 185 | 152 | 99 % | 60 % |
| 35 | Search Result URL Length Size | -0.1 | 118 | 64 | 99 % | 47 % |
| 36 | Number of Questions In H4 Tags Size | -0.1 | 2 | 1 | 6 % | 68 % |
| 37 | Search Result Link Text Length Size | -0.09 | 55 | 44 | 99 % | 50 % |
| 38 | Bytes To First P Tag Size | -0.09 | 89274 | 65709 | 99 % | 52 % |
| 39 | Number of Questions In H1 Tags Size | -0.08 | 2 | 1 | 5 % | 61 % |
| 40 | Number of Bytes to First Match Size | -0.08 | 9741729 | 891162 | 99 % | 45 % |
| 41 | Number of Questions In H5 Tags Size | -0.06 | 1 | 1 | 2 % | 62 % |
| 42 | Number of Schema Products Size | -0.06 | 17 | 1 | 4 % | 69 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 2 | 0 | 1 % | 65 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 175 | 2 | 1 % | 90 % |
| 45 | Head Size Kilobytes Size | -0 | 80 | 1 | 1 % | 91 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 72 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 72 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 72 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 72 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 72 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 90 % |
