Apes Together Strong WA Update is an installer typically used for ElvUI but forked for Weakaura's. It will allow the end user to pick Weakaura's included in this installer and import them by category without having to import multiple Weakaura's all at once and losing your current setup.
TL:DR You choose the Weakaura's to install that are included in this pack.
Currently the Weakaura's offered are set to only display Weakaura's generated for the current raid tier.