How does random forest achieve feature importance?

Related questions

1. What is Lasso feature selection?
2. What is permutation importance?
3. What is random forest regression?
4. Does XGBoost do feature selection?
5. How does feature extraction work?
6. What is XGBoost classification?
7. How does feature selection work?
8. What is XGBoost feature importance?
9. What is feature in feature extraction?
10. Why do we need feature engineering?

Tags

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2. #thanks
3. #selection
4. #their
5. #importance
6. #robustness
7. #popular
8. #provide
9. #machine
10. #impurity
11. #methods
12. #learning
13. #relatively
14. #accuracy
15. #straightforward
16. #feature
17. #among
18. #random
19. #forests
20. #decrease