Asset packs are zip files with checked assets from MakeHuman and the asset repositories.
You can download these to quickly get up and running with a basic set of assets.
A list of available asset packs can be found at the bottom of this page.
These are some common questions about asset packs
Under "apply assets", there should be a "library settings" panel with an "install asset pack" button. Click this to open a file browser. Find the zip file with the asset pack and select this.
Unzip it in you makehuman/v1py3/data directory. See where are my Makehuman files for more information on how to find this directory. For example, if the asset zip file contains a subdirectory "hair", then make sure that the contents of that directory end up under makehuman/v1py3/data/hair.
Not any significant differences, no. Asset packs are simply downloaded assets which are bundled together in a single zip file. Some files have been renamed to better fit a common naming pattern though, and some thumbnails have been scaled/polished to look better on the web.
No, it is already included in MakeHuman. The system assets pack is intended for use in MPFB2.
No, you already have the same assets in that case.
Probably, although it is possible an asset might clash due to different naming. To be safe, you are probably better off by using the asset downloader to download the remaining assets rather than downloading the asset pack.
The assets have been opened in both MPFB2 and MakeHuman, and a cursory inspection has been made to ensure that the asset isn't in any obvious way broken. Most assets will have functional delete groups. Some assets where the lack of a delete group wasn't deemed to be a problem has also been accepted. So "checked" means that at least this level of quality is ensured.
However, there will always be a range of usefulness stemming from the purpose the asset had originally. If an asset was made for a short skinny female character, it might not be viable for a tall fat male character. This will be particularly visible when a delete group is not present, or not fitting the current character. In these cases the character skin might peek through the clothes and require manual correction.
Apart from the "makehuman system assets", the bundled assets are mostly from third part authors. The MakeHuman dev team will not modify their assets directly. If you wish to report that something is wrong, you should reach out to the asset's listed author, preferably on the forums. If you can't reach the author directly, writing a note in the assets forum will probably be most likely to get attention.
"CC" is "Creative Commons", a set of standard copyright/license notices. There are several variations of these, but the two used here are:
These are the asset packs available so far: