What is the primary purpose of Aurora Pass wallet?

Web2 companies that interact with their users primarily through mobile apps, will require that their users download Aurora Pass in order to sign the blockchain transactions coming from those Web2 apps. 

One wallet, instead of multiple — Whereas on Polygon, there’s a wallet in every app (i.e. in Reddit, the “vault” that holds your NFTs are in the Reddit app), in the Aurora strategy, there’s one mobile wallet, Aurora Pass.