From Joomla! Documentation
This article or section is incomplete, which means it may be lacking information. You are welcome to assist in its completion by editing it as well. If this article or section
Recommendations when creating packs to distribute extensions:
Name it with extension type and version at end
* com_extensionxyz_v1.0.zip * mod_extensionxyz_v1.0.zip * plg_extensionxyz_v1.0.zip
Multiple extensions pack
If creating zip/tar files that require unzipping prior to install name the zip accordingly:
It's strongly recommended to use Package ( and higher) for multiple extensions. This avoids unpacking and is easily installable.
Please do test the zip/tar file and install it in a Joomla test server before release your file.