Does a zip file reduce file size?

Related questions

1. How big can a zip file be?
2. Why is my ZIP file not smaller?
3. Can I unzip a file on my iPad?
4. How strong is zip encryption?
5. Does zip reduce file size?
6. How much does a Zip compress?
7. Can videos be zipped?
8. How do I zip a large video file?
9. Does zipping a zipped file make it smaller?
10. How do I make a zip file smaller to email?

Tags

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10. #without
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14. #built
15. #compress
16. #appears
17. #varies