| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| importance of grey literature | 0.25 | 0.6 | 2600 | 79 | 29 |
| importance | 1.11 | 0.5 | 5707 | 15 | 10 |
| of | 0.91 | 0.4 | 2145 | 95 | 2 |
| grey | 0.35 | 0.2 | 9748 | 40 | 4 |
| literature | 1.09 | 0.2 | 1153 | 21 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| importance of grey literature | 2 | 0.9 | 7732 | 29 |
| what is grey literature | 1.09 | 0.4 | 182 | 60 |
| what is meant by grey literature | 0.01 | 0.2 | 5099 | 30 |
| meaning of grey literature | 1.51 | 0.4 | 9649 | 85 |
| what is grey literature in research | 0.87 | 0.6 | 5429 | 66 |
| definition of grey literature | 0.48 | 0.1 | 8516 | 54 |
| what is gray literature | 0.82 | 0.3 | 9841 | 7 |
| grey literature in literature reviews | 1.9 | 0.7 | 8639 | 59 |
| grey literature or gray literature | 0.42 | 0.6 | 6851 | 20 |
| definition of gray literature | 0.28 | 0.2 | 3128 | 5 |
| what is gray literature in research | 1.85 | 0.5 | 2758 | 65 |
| what counts as grey literature | 0.85 | 0.8 | 8003 | 18 |
| examples of grey literature | 1.94 | 1 | 2000 | 60 |
| topics covered in grey literature | 1.43 | 0.9 | 4047 | 42 |
| what are grey literature sources | 0.6 | 0.8 | 5262 | 10 |
| how to find grey literature | 1.18 | 1 | 598 | 97 |
| system for information on grey literature | 0.54 | 0.4 | 7111 | 92 |
| how to find gray literature | 1.03 | 0.2 | 2406 | 34 |
| gray literature from governments | 1.4 | 0.6 | 2503 | 19 |
| white and gray literature | 1.37 | 1 | 2390 | 87 |
