The term or "32 Bit" indicates that this specific version of the mod is built for devices running on 32-bit architecture . Many older or budget Android smartphones use 32-bit systems, and mods built for 64-bit systems will not work on them.
With Google pushing 64-bit exclusively (as of August 2021), one might think the is obsolete. However, the reality is more nuanced: lgl mod menu 32 exclusive