How do you select features in machine learning?

Related questions

1. Why are variables important in research?
2. What is mean decrease Gini?
3. Why do we need feature extraction?
4. What is random forest in simple terms?
5. What is a strong learner?
6. Does random forest give probability?
7. How does random forest select features?
8. What is random forest regression?
9. Why do we need feature engineering?
10. What is XGBoost feature importance?

Tags

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