versioning

games like "minecraft" have versions like mincraft ver.7.5 etc. this is a technique used by the creators to make their products better.  this is called "versioning".
 more like this:

source:dmytroduk.com

versioning is a particular form of something differing in certain respects from an earlier form or other forms of the same type of thing. moreover, this is like evolving your own work like "blog ver1"into "blog ver 2".