What is the meaning of grep command in Linux?

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Tags

1. #global
2. #doing
3. #regular
4. #comes
5. #print
6. #plain
7. #searching
8. #utility
9. #command
10. #printing
11. #match
12. #effect
13. #which
14. #search
15. #expression
16. #globally
17. #matching
18. #lines