Versions are periodic releases of the software represented by the package, and are the Bintray entities that hold the files. "Version" always means a version of a package, and any update or change in the material uploaded and published is a new version.
For more details on how to work with versions, please refer to Managing Your Versions.
Bintray products enable you to assemble a set of packages into a single coherent offering. For example, if you developed a piece of software as both a Maven package and a NuGet package, and in addition, you want to offer it as a Docker image, you may want to assemble all three of these packages into a single offering.
For more details on how to work with products, please refer to Managing Products and EULAs