What is the use of square brackets?

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Tags

1. #modify
2. #brackets
3. #people
4. #original
5. #leave
6. #square
7. #lives
8. #clearer
9. #quote
10. #their
11. #lamarr
12. #somebody
13. #replace
14. #often
15. #money
16. #example
17. #reader