| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| pnas impact factor 2018 | 0.36 | 0.4 | 6111 | 90 | 23 |
| pnas | 0.9 | 0.8 | 9677 | 7 | 4 |
| impact | 1.36 | 0.4 | 4578 | 60 | 6 |
| factor | 1.52 | 0.5 | 9951 | 64 | 6 |
| 2018 | 1.06 | 0.9 | 8395 | 100 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| pnas impact factor 2018 | 1.17 | 0.3 | 3387 | 7 |
| pnas impact factor 2019 | 1.37 | 0.6 | 1040 | 72 |
| pnas impact factor 2016 | 0.9 | 0.7 | 2153 | 96 |
| pnas impact factor 2015 | 1.2 | 0.7 | 6672 | 78 |
| pnas impact factor 2021 | 1.67 | 0.9 | 488 | 95 |
| pnas impact factor 2023 | 0.03 | 0.1 | 9900 | 33 |
| pnas impact factor 2020 | 1.83 | 0.5 | 3748 | 22 |
| pnas impact factor 2024 | 1.76 | 0.1 | 3182 | 94 |
| pnas impact factor 2022 | 0.72 | 0.3 | 487 | 92 |
