This property defines the Unicodes which belongs to Glagolitic block
Characters like Ⰰ,Ⰱ,Ⰲ, etc. are listed under Glagolitic Block.
96 Characters are present in Glagolitic Block starting with the Unicode point U+2C00 that represents the character Ⰰ.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.