What is Version?
Version number is very useful to identify build.
Especially when uploading created APPs over respective App Stores.
How is Version used?
If you upload application with Version number 1.0 to any App Store for the first time.
For the second time when you update the same app, it is needed to upgrade/increase the value of the Version number greater than 1.0.
First time upload: 1.0
Second time: “1.1” OR “2” as per user’s convenience.