What's the difference between lossy and lossless compression?

Related questions

1. What does lossy compression mean?
2. How does parquet compression work?
3. What is the difference between lossy compression and lossless compression?
4. What is block compression?
5. What is bzip2 compression?
6. What is the distance between compression and rarefaction?
7. What are the compression techniques?
8. What is compression and rarefaction?
9. Why do people use lossless compression?
10. What type of files would be compressed using lossless compression?

Tags

1. #decompressed
2. #original
3. #picture
4. #compressed
5. #remains
6. #worse
7. #lossy
8. #lossless
9. #means
10. #removes
11. #compression
12. #quality
13. #permanently