How does feature selection work?

Related questions

1. What is feature selection in data mining?
2. What is feature importance in random forest?
3. How is feature importance calculated in random forest?
4. What is variable research?
5. What is random forest feature importance?
6. What is a Random Forest model?
7. Does random forest need feature selection?
8. Does Random Forest select a subset of features for every tree or every node?
9. Why is correlation important in machine learning?
10. What is random forest in simple terms?

Tags

1. #which
2. #models
3. #contribute
4. #feature
5. #interested
6. #selection
7. #those
8. #accuracy
9. #manually
10. #output
11. #irrelevant
12. #variable
13. #prediction
14. #automatically
15. #learn
16. #select
17. #model
18. #where
19. #process
20. #features
21. #based
22. #having
23. #decrease