What is the difference between NPM install and NPM install -- save?

Related questions

1. Why we do NPM install?
2. Does node JS come with NPM?
3. What is a node JS application?
4. What does -- save do NPM install?
5. Do you need node JS for NPM?
6. How do node JS servers work?
7. Does node js need web server?
8. What NPM means?
9. Does NPM install add to package JSON?
10. What is callback in node JS?

Tags

1. #devdependencies
2. #while
3. #install
4. #instead
5. #difference
6. #dependency
7. #development
8. #between
9. #modules
10. #these
11. #devdependency
12. #which
13. #dependencies
14. #runtime
15. #during
16. #installation
17. #required